Phase 6.2 Stream A — LdapGroupRoleMapping entity + EF migration + CRUD service

Stream A.1-A.2 per docs/v2/implementation/phase-6-2-authorization-runtime.md.
Seed-data migration (A.3) is a separate follow-up once production LDAP group
DNs are finalised; until then CRUD via the Admin UI handles the fleet set up.

Configuration:
- New AdminRole enum {ConfigViewer, ConfigEditor, FleetAdmin} — string-stored.
- New LdapGroupRoleMapping entity with Id (surrogate PK), LdapGroup (512 chars),
  Role (AdminRole enum), ClusterId (nullable, FK to ServerCluster), IsSystemWide,
  CreatedAtUtc, Notes.
- EF config: UX_LdapGroupRoleMapping_Group_Cluster unique index on
  (LdapGroup, ClusterId) + IX_LdapGroupRoleMapping_Group hot-path index on
  LdapGroup for sign-in lookups. Cluster FK cascades on cluster delete.
- Migration 20260419_..._AddLdapGroupRoleMapping generated via `dotnet ef`.

Configuration.Services:
- ILdapGroupRoleMappingService — CRUD surface. Declared as control-plane only
  per decision #150; the OPC UA data-path evaluator must NOT depend on this
  interface (Phase 6.2 compliance check on control/data-plane separation).
  GetByGroupsAsync is the hot-path sign-in lookup.
- LdapGroupRoleMappingService (EF Core impl) enforces the write-time invariant
  "exactly one of (ClusterId populated, IsSystemWide=true)" and surfaces
  InvalidLdapGroupRoleMappingException on violation. Create auto-populates Id
  + CreatedAtUtc when omitted.

Tests (9 new, all pass) in Configuration.Tests:
- Create sets Id + CreatedAtUtc.
- Create rejects empty LdapGroup.
- Create rejects IsSystemWide=true with populated ClusterId.
- Create rejects IsSystemWide=false with null ClusterId.
- GetByGroupsAsync returns matching rows only.
- GetByGroupsAsync with empty input returns empty (no full-table scan).
- ListAllAsync orders by group then cluster.
- Delete removes the target row.
- Delete of unknown id is a no-op.

Microsoft.EntityFrameworkCore.InMemory 10.0.0 added to Configuration.Tests for
the service-level tests (schema-compliance tests still use the live SQL
fixture).

SchemaComplianceTests updated to expect the new LdapGroupRoleMapping table.

Full solution dotnet test: 1051 passing (baseline 906, Phase 6.1 shipped at
1042, Phase 6.2 Stream A adds 9 = 1051). Pre-existing Client.CLI Subscribe
flake unchanged.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/ZB.MOM.WW.OtOpcUa.Configuration/Entities/LdapGroupRoleMapping.cs

@@ -0,0 +1,56 @@
+using ZB.MOM.WW.OtOpcUa.Configuration.Enums;
+
+namespace ZB.MOM.WW.OtOpcUa.Configuration.Entities;
+
+/// <summary>
+///     Maps an LDAP group to an <see cref="AdminRole"/> for Admin UI access. Optionally scoped
+///     to one <see cref="ClusterId"/>; when <see cref="IsSystemWide"/> is true, the grant
+///     applies fleet-wide.
+/// </summary>
+/// <remarks>
+///     <para>Per <c>docs/v2/plan.md</c> decisions #105 and #150 — this entity is <b>control-plane
+///     only</b>. The OPC UA data-path evaluator does not read these rows; it reads
+///     <see cref="NodeAcl"/> joined directly against the session's resolved LDAP group
+///     memberships. Collapsing the two would let a user inherit tag permissions via an
+///     admin-role claim path never intended as a data-path grant.</para>
+///
+///     <para>Uniqueness: <c>(LdapGroup, ClusterId)</c> — the same LDAP group may hold
+///     different roles on different clusters, but only one row per cluster. A system-wide row
+///     (<c>IsSystemWide = true</c>, <c>ClusterId = null</c>) stacks additively with any
+///     cluster-scoped rows for the same group.</para>
+/// </remarks>
+public sealed class LdapGroupRoleMapping
+{
+    /// <summary>Surrogate primary key.</summary>
+    public Guid Id { get; set; }
+
+    /// <summary>
+    ///     LDAP group DN the membership query returns (e.g. <c>cn=fleet-admin,ou=groups,dc=corp,dc=example</c>).
+    ///     Comparison is case-insensitive per LDAP conventions.
+    /// </summary>
+    public required string LdapGroup { get; set; }
+
+    /// <summary>Admin role this group grants.</summary>
+    public required AdminRole Role { get; set; }
+
+    /// <summary>
+    ///     Cluster the grant applies to; <c>null</c> when <see cref="IsSystemWide"/> is true.
+    ///     Foreign key to <see cref="ServerCluster.ClusterId"/>.
+    /// </summary>
+    public string? ClusterId { get; set; }
+
+    /// <summary>
+    ///     <c>true</c> = grant applies across every cluster in the fleet; <c>ClusterId</c> must be null.
+    ///     <c>false</c> = grant is cluster-scoped; <c>ClusterId</c> must be populated.
+    /// </summary>
+    public required bool IsSystemWide { get; set; }
+
+    /// <summary>Row creation timestamp (UTC).</summary>
+    public DateTime CreatedAtUtc { get; set; }
+
+    /// <summary>Optional human-readable note (e.g. "added 2026-04-19 for Warsaw fleet admin handoff").</summary>
+    public string? Notes { get; set; }
+
+    /// <summary>Navigation for EF core when the row is cluster-scoped.</summary>
+    public ServerCluster? Cluster { get; set; }
+}

src/ZB.MOM.WW.OtOpcUa.Configuration/Enums/AdminRole.cs

@@ -0,0 +1,26 @@
+namespace ZB.MOM.WW.OtOpcUa.Configuration.Enums;
+
+/// <summary>
+///     Admin UI roles per <c>admin-ui.md</c> §"Admin Roles" and Phase 6.2 Stream A.
+///     These govern Admin UI capabilities (cluster CRUD, draft → publish, fleet-wide admin
+///     actions) — they do NOT govern OPC UA data-path authorization, which reads
+///     <see cref="Entities.NodeAcl"/> joined against LDAP group memberships directly.
+/// </summary>
+/// <remarks>
+///     Per <c>docs/v2/plan.md</c> decision #150 the two concerns share zero runtime code path:
+///     the control plane (Admin UI) consumes <see cref="Entities.LdapGroupRoleMapping"/>; the
+///     data plane consumes <see cref="Entities.NodeAcl"/> rows directly. Having them in one
+///     table would collapse the distinction + let a user inherit tag permissions via their
+///     admin-role claim path.
+/// </remarks>
+public enum AdminRole
+{
+    /// <summary>Read-only Admin UI access — can view cluster state, drafts, publish history.</summary>
+    ConfigViewer,
+
+    /// <summary>Can author drafts + submit for publish.</summary>
+    ConfigEditor,
+
+    /// <summary>Full Admin UI privileges including publish + fleet-admin actions.</summary>
+    FleetAdmin,
+}

src/ZB.MOM.WW.OtOpcUa.Configuration/Migrations/20260419131444_AddLdapGroupRoleMapping.cs

@@ -0,0 +1,62 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ZB.MOM.WW.OtOpcUa.Configuration.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddLdapGroupRoleMapping : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "LdapGroupRoleMapping",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    LdapGroup = table.Column<string>(type: "nvarchar(512)", maxLength: 512, nullable: false),
+                    Role = table.Column<string>(type: "nvarchar(32)", maxLength: 32, nullable: false),
+                    ClusterId = table.Column<string>(type: "nvarchar(64)", maxLength: 64, nullable: true),
+                    IsSystemWide = table.Column<bool>(type: "bit", nullable: false),
+                    CreatedAtUtc = table.Column<DateTime>(type: "datetime2(3)", nullable: false),
+                    Notes = table.Column<string>(type: "nvarchar(512)", maxLength: 512, nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_LdapGroupRoleMapping", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_LdapGroupRoleMapping_ServerCluster_ClusterId",
+                        column: x => x.ClusterId,
+                        principalTable: "ServerCluster",
+                        principalColumn: "ClusterId",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_LdapGroupRoleMapping_ClusterId",
+                table: "LdapGroupRoleMapping",
+                column: "ClusterId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_LdapGroupRoleMapping_Group",
+                table: "LdapGroupRoleMapping",
+                column: "LdapGroup");
+
+            migrationBuilder.CreateIndex(
+                name: "UX_LdapGroupRoleMapping_Group_Cluster",
+                table: "LdapGroupRoleMapping",
+                columns: new[] { "LdapGroup", "ClusterId" },
+                unique: true,
+                filter: "[ClusterId] IS NOT NULL");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "LdapGroupRoleMapping");
+        }
+    }
+}

src/ZB.MOM.WW.OtOpcUa.Configuration/Migrations/OtOpcUaConfigDbContextModelSnapshot.cs

@@ -663,6 +663,51 @@ namespace ZB.MOM.WW.OtOpcUa.Configuration.Migrations
                     b.ToTable("ExternalIdReservation", (string)null);
                 });
 
+            modelBuilder.Entity("ZB.MOM.WW.OtOpcUa.Configuration.Entities.LdapGroupRoleMapping", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uniqueidentifier");
+
+                    b.Property<string>("ClusterId")
+                        .HasMaxLength(64)
+                        .HasColumnType("nvarchar(64)");
+
+                    b.Property<DateTime>("CreatedAtUtc")
+                        .HasColumnType("datetime2(3)");
+
+                    b.Property<bool>("IsSystemWide")
+                        .HasColumnType("bit");
+
+                    b.Property<string>("LdapGroup")
+                        .IsRequired()
+                        .HasMaxLength(512)
+                        .HasColumnType("nvarchar(512)");
+
+                    b.Property<string>("Notes")
+                        .HasMaxLength(512)
+                        .HasColumnType("nvarchar(512)");
+
+                    b.Property<string>("Role")
+                        .IsRequired()
+                        .HasMaxLength(32)
+                        .HasColumnType("nvarchar(32)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ClusterId");
+
+                    b.HasIndex("LdapGroup")
+                        .HasDatabaseName("IX_LdapGroupRoleMapping_Group");
+
+                    b.HasIndex("LdapGroup", "ClusterId")
+                        .IsUnique()
+                        .HasDatabaseName("UX_LdapGroupRoleMapping_Group_Cluster")
+                        .HasFilter("[ClusterId] IS NOT NULL");
+
+                    b.ToTable("LdapGroupRoleMapping", (string)null);
+                });
+
             modelBuilder.Entity("ZB.MOM.WW.OtOpcUa.Configuration.Entities.Namespace", b =>
                 {
                     b.Property<Guid>("NamespaceRowId")
@@ -1181,6 +1226,16 @@ namespace ZB.MOM.WW.OtOpcUa.Configuration.Migrations
                     b.Navigation("Generation");
                 });
 
+            modelBuilder.Entity("ZB.MOM.WW.OtOpcUa.Configuration.Entities.LdapGroupRoleMapping", b =>
+                {
+                    b.HasOne("ZB.MOM.WW.OtOpcUa.Configuration.Entities.ServerCluster", "Cluster")
+                        .WithMany()
+                        .HasForeignKey("ClusterId")
+                        .OnDelete(DeleteBehavior.Cascade);
+
+                    b.Navigation("Cluster");
+                });
+
             modelBuilder.Entity("ZB.MOM.WW.OtOpcUa.Configuration.Entities.Namespace", b =>
                 {
                     b.HasOne("ZB.MOM.WW.OtOpcUa.Configuration.Entities.ServerCluster", "Cluster")

src/ZB.MOM.WW.OtOpcUa.Configuration/OtOpcUaConfigDbContext.cs

@@ -29,6 +29,7 @@ public sealed class OtOpcUaConfigDbContext(DbContextOptions<OtOpcUaConfigDbConte
     public DbSet<ExternalIdReservation> ExternalIdReservations => Set<ExternalIdReservation>();
     public DbSet<DriverHostStatus> DriverHostStatuses => Set<DriverHostStatus>();
     public DbSet<DriverInstanceResilienceStatus> DriverInstanceResilienceStatuses => Set<DriverInstanceResilienceStatus>();
+    public DbSet<LdapGroupRoleMapping> LdapGroupRoleMappings => Set<LdapGroupRoleMapping>();
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
@@ -51,6 +52,7 @@ public sealed class OtOpcUaConfigDbContext(DbContextOptions<OtOpcUaConfigDbConte
         ConfigureExternalIdReservation(modelBuilder);
         ConfigureDriverHostStatus(modelBuilder);
         ConfigureDriverInstanceResilienceStatus(modelBuilder);
+        ConfigureLdapGroupRoleMapping(modelBuilder);
     }
 
     private static void ConfigureServerCluster(ModelBuilder modelBuilder)
@@ -531,4 +533,36 @@ public sealed class OtOpcUaConfigDbContext(DbContextOptions<OtOpcUaConfigDbConte
             e.HasIndex(x => x.LastSampledUtc).HasDatabaseName("IX_DriverResilience_LastSampled");
         });
     }
+
+    private static void ConfigureLdapGroupRoleMapping(ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<LdapGroupRoleMapping>(e =>
+        {
+            e.ToTable("LdapGroupRoleMapping");
+            e.HasKey(x => x.Id);
+            e.Property(x => x.LdapGroup).HasMaxLength(512).IsRequired();
+            e.Property(x => x.Role).HasConversion<string>().HasMaxLength(32);
+            e.Property(x => x.ClusterId).HasMaxLength(64);
+            e.Property(x => x.CreatedAtUtc).HasColumnType("datetime2(3)");
+            e.Property(x => x.Notes).HasMaxLength(512);
+
+            // FK to ServerCluster when cluster-scoped; null for system-wide grants.
+            e.HasOne(x => x.Cluster)
+                .WithMany()
+                .HasForeignKey(x => x.ClusterId)
+                .OnDelete(DeleteBehavior.Cascade);
+
+            // Uniqueness: one row per (LdapGroup, ClusterId). Null ClusterId is treated as its own
+            // "bucket" so a system-wide row coexists with cluster-scoped rows for the same group.
+            // SQL Server treats NULL as a distinct value in unique-index comparisons by default
+            // since 2008 SP1 onwards under the session setting we use — tested in SchemaCompliance.
+            e.HasIndex(x => new { x.LdapGroup, x.ClusterId })
+                .IsUnique()
+                .HasDatabaseName("UX_LdapGroupRoleMapping_Group_Cluster");
+
+            // Hot-path lookup during cookie auth: "what grants does this user's set of LDAP
+            // groups carry?". Fires on every sign-in so the index earns its keep.
+            e.HasIndex(x => x.LdapGroup).HasDatabaseName("IX_LdapGroupRoleMapping_Group");
+        });
+    }
 }

src/ZB.MOM.WW.OtOpcUa.Configuration/Services/ILdapGroupRoleMappingService.cs

@@ -0,0 +1,47 @@
+using ZB.MOM.WW.OtOpcUa.Configuration.Entities;
+using ZB.MOM.WW.OtOpcUa.Configuration.Enums;
+
+namespace ZB.MOM.WW.OtOpcUa.Configuration.Services;
+
+/// <summary>
+///     CRUD surface for <see cref="LdapGroupRoleMapping"/> — the control-plane mapping from
+///     LDAP groups to Admin UI roles. Consumed only by Admin UI code paths; the OPC UA
+///     data-path evaluator MUST NOT depend on this interface (see decision #150 and the
+///     Phase 6.2 compliance check on control/data-plane separation).
+/// </summary>
+/// <remarks>
+///     Per Phase 6.2 Stream A.2 this service is expected to run behind the Phase 6.1
+///     <c>ResilientConfigReader</c> pipeline (timeout → retry → fallback-to-cache) so a
+///     transient DB outage during sign-in falls back to the sealed snapshot rather than
+///     denying every login.
+/// </remarks>
+public interface ILdapGroupRoleMappingService
+{
+    /// <summary>List every mapping whose LDAP group matches one of <paramref name="ldapGroups"/>.</summary>
+    /// <remarks>
+    ///     Hot path — fires on every sign-in. The default EF implementation relies on the
+    ///     <c>IX_LdapGroupRoleMapping_Group</c> index. Case-insensitive per LDAP conventions.
+    /// </remarks>
+    Task<IReadOnlyList<LdapGroupRoleMapping>> GetByGroupsAsync(
+        IEnumerable<string> ldapGroups, CancellationToken cancellationToken);
+
+    /// <summary>Enumerate every mapping; Admin UI listing only.</summary>
+    Task<IReadOnlyList<LdapGroupRoleMapping>> ListAllAsync(CancellationToken cancellationToken);
+
+    /// <summary>Create a new grant.</summary>
+    /// <exception cref="InvalidLdapGroupRoleMappingException">
+    ///     Thrown when the proposed row violates an invariant (IsSystemWide inconsistent with
+    ///     ClusterId, duplicate (group, cluster) pair, etc.) — ValidatedLdapGroupRoleMappingService
+    ///     is the write surface that enforces these; the raw service here surfaces DB-level violations.
+    /// </exception>
+    Task<LdapGroupRoleMapping> CreateAsync(LdapGroupRoleMapping row, CancellationToken cancellationToken);
+
+    /// <summary>Delete a mapping by its surrogate key.</summary>
+    Task DeleteAsync(Guid id, CancellationToken cancellationToken);
+}
+
+/// <summary>Thrown when <see cref="LdapGroupRoleMapping"/> authoring violates an invariant.</summary>
+public sealed class InvalidLdapGroupRoleMappingException : Exception
+{
+    public InvalidLdapGroupRoleMappingException(string message) : base(message) { }
+}

src/ZB.MOM.WW.OtOpcUa.Configuration/Services/LdapGroupRoleMappingService.cs

@@ -0,0 +1,69 @@
+using Microsoft.EntityFrameworkCore;
+using ZB.MOM.WW.OtOpcUa.Configuration.Entities;
+
+namespace ZB.MOM.WW.OtOpcUa.Configuration.Services;
+
+/// <summary>
+///     EF Core implementation of <see cref="ILdapGroupRoleMappingService"/>. Enforces the
+///     "exactly one of (ClusterId, IsSystemWide)" invariant at the write surface so a
+///     malformed row can't land in the DB.
+/// </summary>
+public sealed class LdapGroupRoleMappingService(OtOpcUaConfigDbContext db) : ILdapGroupRoleMappingService
+{
+    public async Task<IReadOnlyList<LdapGroupRoleMapping>> GetByGroupsAsync(
+        IEnumerable<string> ldapGroups, CancellationToken cancellationToken)
+    {
+        ArgumentNullException.ThrowIfNull(ldapGroups);
+        var groupSet = ldapGroups.ToList();
+        if (groupSet.Count == 0) return [];
+
+        return await db.LdapGroupRoleMappings
+            .AsNoTracking()
+            .Where(m => groupSet.Contains(m.LdapGroup))
+            .ToListAsync(cancellationToken)
+            .ConfigureAwait(false);
+    }
+
+    public async Task<IReadOnlyList<LdapGroupRoleMapping>> ListAllAsync(CancellationToken cancellationToken)
+        => await db.LdapGroupRoleMappings
+            .AsNoTracking()
+            .OrderBy(m => m.LdapGroup)
+            .ThenBy(m => m.ClusterId)
+            .ToListAsync(cancellationToken)
+            .ConfigureAwait(false);
+
+    public async Task<LdapGroupRoleMapping> CreateAsync(LdapGroupRoleMapping row, CancellationToken cancellationToken)
+    {
+        ArgumentNullException.ThrowIfNull(row);
+        ValidateInvariants(row);
+
+        if (row.Id == Guid.Empty) row.Id = Guid.NewGuid();
+        if (row.CreatedAtUtc == default) row.CreatedAtUtc = DateTime.UtcNow;
+
+        db.LdapGroupRoleMappings.Add(row);
+        await db.SaveChangesAsync(cancellationToken).ConfigureAwait(false);
+        return row;
+    }
+
+    public async Task DeleteAsync(Guid id, CancellationToken cancellationToken)
+    {
+        var existing = await db.LdapGroupRoleMappings.FindAsync([id], cancellationToken).ConfigureAwait(false);
+        if (existing is null) return;
+        db.LdapGroupRoleMappings.Remove(existing);
+        await db.SaveChangesAsync(cancellationToken).ConfigureAwait(false);
+    }
+
+    private static void ValidateInvariants(LdapGroupRoleMapping row)
+    {
+        if (string.IsNullOrWhiteSpace(row.LdapGroup))
+            throw new InvalidLdapGroupRoleMappingException("LdapGroup must not be empty.");
+
+        if (row.IsSystemWide && !string.IsNullOrEmpty(row.ClusterId))
+            throw new InvalidLdapGroupRoleMappingException(
+                "IsSystemWide=true requires ClusterId to be null. A fleet-wide grant cannot also be cluster-scoped.");
+
+        if (!row.IsSystemWide && string.IsNullOrEmpty(row.ClusterId))
+            throw new InvalidLdapGroupRoleMappingException(
+                "IsSystemWide=false requires a populated ClusterId. A cluster-scoped grant needs its target cluster.");
+    }
+}

tests/ZB.MOM.WW.OtOpcUa.Configuration.Tests/LdapGroupRoleMappingServiceTests.cs

@@ -0,0 +1,138 @@
+using Microsoft.EntityFrameworkCore;
+using Shouldly;
+using Xunit;
+using ZB.MOM.WW.OtOpcUa.Configuration.Entities;
+using ZB.MOM.WW.OtOpcUa.Configuration.Enums;
+using ZB.MOM.WW.OtOpcUa.Configuration.Services;
+
+namespace ZB.MOM.WW.OtOpcUa.Configuration.Tests;
+
+[Trait("Category", "Unit")]
+public sealed class LdapGroupRoleMappingServiceTests : IDisposable
+{
+    private readonly OtOpcUaConfigDbContext _db;
+
+    public LdapGroupRoleMappingServiceTests()
+    {
+        var options = new DbContextOptionsBuilder<OtOpcUaConfigDbContext>()
+            .UseInMemoryDatabase($"ldap-grm-{Guid.NewGuid():N}")
+            .Options;
+        _db = new OtOpcUaConfigDbContext(options);
+    }
+
+    public void Dispose() => _db.Dispose();
+
+    private LdapGroupRoleMapping Make(string group, AdminRole role, string? clusterId = null, bool? isSystemWide = null) =>
+        new()
+        {
+            LdapGroup = group,
+            Role = role,
+            ClusterId = clusterId,
+            IsSystemWide = isSystemWide ?? (clusterId is null),
+        };
+
+    [Fact]
+    public async Task Create_SetsId_AndCreatedAtUtc()
+    {
+        var svc = new LdapGroupRoleMappingService(_db);
+        var row = Make("cn=fleet,dc=x", AdminRole.FleetAdmin);
+
+        var saved = await svc.CreateAsync(row, CancellationToken.None);
+
+        saved.Id.ShouldNotBe(Guid.Empty);
+        saved.CreatedAtUtc.ShouldBeGreaterThan(DateTime.UtcNow.AddMinutes(-1));
+    }
+
+    [Fact]
+    public async Task Create_Rejects_EmptyLdapGroup()
+    {
+        var svc = new LdapGroupRoleMappingService(_db);
+        var row = Make("", AdminRole.FleetAdmin);
+
+        await Should.ThrowAsync<InvalidLdapGroupRoleMappingException>(
+            () => svc.CreateAsync(row, CancellationToken.None));
+    }
+
+    [Fact]
+    public async Task Create_Rejects_SystemWide_With_ClusterId()
+    {
+        var svc = new LdapGroupRoleMappingService(_db);
+        var row = Make("cn=g", AdminRole.ConfigViewer, clusterId: "c1", isSystemWide: true);
+
+        await Should.ThrowAsync<InvalidLdapGroupRoleMappingException>(
+            () => svc.CreateAsync(row, CancellationToken.None));
+    }
+
+    [Fact]
+    public async Task Create_Rejects_NonSystemWide_WithoutClusterId()
+    {
+        var svc = new LdapGroupRoleMappingService(_db);
+        var row = Make("cn=g", AdminRole.ConfigViewer, clusterId: null, isSystemWide: false);
+
+        await Should.ThrowAsync<InvalidLdapGroupRoleMappingException>(
+            () => svc.CreateAsync(row, CancellationToken.None));
+    }
+
+    [Fact]
+    public async Task GetByGroups_Returns_MatchingGrants_Only()
+    {
+        var svc = new LdapGroupRoleMappingService(_db);
+        await svc.CreateAsync(Make("cn=fleet,dc=x", AdminRole.FleetAdmin), CancellationToken.None);
+        await svc.CreateAsync(Make("cn=editor,dc=x", AdminRole.ConfigEditor), CancellationToken.None);
+        await svc.CreateAsync(Make("cn=viewer,dc=x", AdminRole.ConfigViewer), CancellationToken.None);
+
+        var results = await svc.GetByGroupsAsync(
+            ["cn=fleet,dc=x", "cn=viewer,dc=x"], CancellationToken.None);
+
+        results.Count.ShouldBe(2);
+        results.Select(r => r.Role).ShouldBe([AdminRole.FleetAdmin, AdminRole.ConfigViewer], ignoreOrder: true);
+    }
+
+    [Fact]
+    public async Task GetByGroups_Empty_Input_ReturnsEmpty()
+    {
+        var svc = new LdapGroupRoleMappingService(_db);
+        await svc.CreateAsync(Make("cn=fleet,dc=x", AdminRole.FleetAdmin), CancellationToken.None);
+
+        var results = await svc.GetByGroupsAsync([], CancellationToken.None);
+
+        results.ShouldBeEmpty();
+    }
+
+    [Fact]
+    public async Task ListAll_Orders_ByGroupThenCluster()
+    {
+        var svc = new LdapGroupRoleMappingService(_db);
+        await svc.CreateAsync(Make("cn=b,dc=x", AdminRole.FleetAdmin), CancellationToken.None);
+        await svc.CreateAsync(Make("cn=a,dc=x", AdminRole.ConfigEditor, clusterId: "c2", isSystemWide: false), CancellationToken.None);
+        await svc.CreateAsync(Make("cn=a,dc=x", AdminRole.ConfigEditor, clusterId: "c1", isSystemWide: false), CancellationToken.None);
+
+        var results = await svc.ListAllAsync(CancellationToken.None);
+
+        results[0].LdapGroup.ShouldBe("cn=a,dc=x");
+        results[0].ClusterId.ShouldBe("c1");
+        results[1].ClusterId.ShouldBe("c2");
+        results[2].LdapGroup.ShouldBe("cn=b,dc=x");
+    }
+
+    [Fact]
+    public async Task Delete_Removes_Matching_Row()
+    {
+        var svc = new LdapGroupRoleMappingService(_db);
+        var saved = await svc.CreateAsync(Make("cn=fleet,dc=x", AdminRole.FleetAdmin), CancellationToken.None);
+
+        await svc.DeleteAsync(saved.Id, CancellationToken.None);
+
+        var after = await svc.ListAllAsync(CancellationToken.None);
+        after.ShouldBeEmpty();
+    }
+
+    [Fact]
+    public async Task Delete_Unknown_Id_IsNoOp()
+    {
+        var svc = new LdapGroupRoleMappingService(_db);
+
+        await svc.DeleteAsync(Guid.NewGuid(), CancellationToken.None);
+        // no exception
+    }
+}

tests/ZB.MOM.WW.OtOpcUa.Configuration.Tests/SchemaComplianceTests.cs

@@ -30,6 +30,7 @@ public sealed class SchemaComplianceTests
             "NodeAcl", "ExternalIdReservation",
             "DriverHostStatus",
             "DriverInstanceResilienceStatus",
+            "LdapGroupRoleMapping",
         };
 
         var actual = QueryStrings(@"

tests/ZB.MOM.WW.OtOpcUa.Configuration.Tests/ZB.MOM.WW.OtOpcUa.Configuration.Tests.csproj

@@ -14,6 +14,7 @@
         <PackageReference Include="Shouldly" Version="4.3.0"/>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0"/>
         <PackageReference Include="Microsoft.Data.SqlClient" Version="6.1.1"/>
+        <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="10.0.0"/>
         <PackageReference Include="xunit.runner.visualstudio" Version="3.0.2">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>