feat(configdb): ReviewRemediationIndexes migration — AuditLog (Kind, Actor) + AuditLogEntries composite indexes

AuditLog indexes are raw SQL ON ps_AuditLog_Month so they stay partition-aligned for the switch purge.

src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Configurations/AuditConfiguration.cs

@@ -40,6 +40,19 @@ public class AuditLogEntryConfiguration : IEntityTypeConfiguration<AuditLogEntry
         builder.HasIndex(a => a.EntityType);
         builder.HasIndex(a => a.EntityId);
         builder.HasIndex(a => a.Action);
+        // Review-remediation composite indexes (ReviewRemediationIndexes). The single-column
+        // Timestamp/User/EntityType indexes above are kept: (Timestamp DESC, Id DESC) only
+        // subsumes Timestamp conceptually, and dropping existing indexes is deliberately
+        // left to a later, measured change.
+        builder.HasIndex(a => new { a.EntityType, a.Timestamp })
+            .IsDescending(false, true)
+            .HasDatabaseName("IX_AuditLogEntries_EntityType_Timestamp");
+        builder.HasIndex(a => new { a.User, a.Timestamp })
+            .IsDescending(false, true)
+            .HasDatabaseName("IX_AuditLogEntries_User_Timestamp");
+        builder.HasIndex(a => new { a.Timestamp, a.Id })
+            .IsDescending(true, true)
+            .HasDatabaseName("IX_AuditLogEntries_Timestamp_Id");
         builder.HasIndex(a => a.BundleImportId).HasDatabaseName("IX_AuditLogEntries_BundleImportId");
     }
 }

src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Configurations/AuditLogEntityTypeConfiguration.cs

@@ -229,5 +229,17 @@ public class AuditLogEntityTypeConfiguration : IEntityTypeConfiguration<AuditLog
             .IsDescending(false, true)
             .HasFilter("[Target] IS NOT NULL")
             .HasDatabaseName("IX_AuditLog_Target_Occurred");
+
+        // Review-remediation indexes (ReviewRemediationIndexes migration): the Audit
+        // Log page's Kind and Actor filters ordered newest-first. Kind is a persisted
+        // computed column (indexable). Created via raw SQL ON ps_AuditLog_Month so they
+        // stay partition-aligned for the partition-switch purge.
+        builder.HasIndex(e => new { e.Kind, e.OccurredAtUtc })
+            .IsDescending(false, true)
+            .HasDatabaseName("IX_AuditLog_Kind_Occurred");
+
+        builder.HasIndex(e => new { e.Actor, e.OccurredAtUtc })
+            .IsDescending(false, true)
+            .HasDatabaseName("IX_AuditLog_Actor_Occurred");
     }
 }

src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Migrations/20261022133907_ReviewRemediationIndexes.cs

@@ -0,0 +1,72 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Migrations
+{
+    /// <summary>Review-remediation composite indexes on AuditLog (partition-aligned, raw SQL) and AuditLogEntries.</summary>
+    public partial class ReviewRemediationIndexes : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateIndex(
+                name: "IX_AuditLogEntries_EntityType_Timestamp",
+                table: "AuditLogEntries",
+                columns: new[] { "EntityType", "Timestamp" },
+                descending: new[] { false, true });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_AuditLogEntries_Timestamp_Id",
+                table: "AuditLogEntries",
+                columns: new[] { "Timestamp", "Id" },
+                descending: new bool[0]);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_AuditLogEntries_User_Timestamp",
+                table: "AuditLogEntries",
+                columns: new[] { "User", "Timestamp" },
+                descending: new[] { false, true });
+
+            // AuditLog is monthly-partitioned (ps_AuditLog_Month) with a partition-switch
+            // purge, so these two indexes MUST be partition-aligned. EF's CreateIndex cannot
+            // express the ON ps_AuditLog_Month(OccurredAtUtc) clause -> raw SQL, exactly as
+            // IX_AuditLog_Node_Occurred (AddAuditLogSourceNode). Kind is a PERSISTED computed
+            // column, so it is indexable. On a large production AuditLog consider adding
+            // WITH (ONLINE = ON) (Enterprise edition) to the generated script.
+            migrationBuilder.Sql(@"
+CREATE NONCLUSTERED INDEX IX_AuditLog_Kind_Occurred
+ON dbo.AuditLog (Kind, OccurredAtUtc DESC)
+ON ps_AuditLog_Month(OccurredAtUtc);");
+
+            migrationBuilder.Sql(@"
+CREATE NONCLUSTERED INDEX IX_AuditLog_Actor_Occurred
+ON dbo.AuditLog (Actor, OccurredAtUtc DESC)
+ON ps_AuditLog_Month(OccurredAtUtc);");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_AuditLogEntries_EntityType_Timestamp",
+                table: "AuditLogEntries");
+
+            migrationBuilder.DropIndex(
+                name: "IX_AuditLogEntries_Timestamp_Id",
+                table: "AuditLogEntries");
+
+            migrationBuilder.DropIndex(
+                name: "IX_AuditLogEntries_User_Timestamp",
+                table: "AuditLogEntries");
+
+            migrationBuilder.Sql(@"
+IF EXISTS (SELECT 1 FROM sys.indexes WHERE name = 'IX_AuditLog_Actor_Occurred' AND object_id = OBJECT_ID('dbo.AuditLog'))
+    DROP INDEX IX_AuditLog_Actor_Occurred ON dbo.AuditLog;");
+
+            migrationBuilder.Sql(@"
+IF EXISTS (SELECT 1 FROM sys.indexes WHERE name = 'IX_AuditLog_Kind_Occurred' AND object_id = OBJECT_ID('dbo.AuditLog'))
+    DROP INDEX IX_AuditLog_Kind_Occurred ON dbo.AuditLog;");
+        }
+    }
+}

src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Migrations/ScadaBridgeDbContextModelSnapshot.cs

@@ -98,6 +98,18 @@ namespace ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Migrations
 
                     b.HasIndex("User");
 
+                    b.HasIndex("EntityType", "Timestamp")
+                        .IsDescending(false, true)
+                        .HasDatabaseName("IX_AuditLogEntries_EntityType_Timestamp");
+
+                    b.HasIndex("Timestamp", "Id")
+                        .IsDescending()
+                        .HasDatabaseName("IX_AuditLogEntries_Timestamp_Id");
+
+                    b.HasIndex("User", "Timestamp")
+                        .IsDescending(false, true)
+                        .HasDatabaseName("IX_AuditLogEntries_User_Timestamp");
+
                     b.ToTable("AuditLogEntries");
                 });
 
@@ -1871,6 +1883,14 @@ namespace ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Migrations
                     b.HasIndex("ParentExecutionId")
                         .HasDatabaseName("IX_AuditLog_ParentExecution");
 
+                    b.HasIndex("Actor", "OccurredAtUtc")
+                        .IsDescending(false, true)
+                        .HasDatabaseName("IX_AuditLog_Actor_Occurred");
+
+                    b.HasIndex("Kind", "OccurredAtUtc")
+                        .IsDescending(false, true)
+                        .HasDatabaseName("IX_AuditLog_Kind_Occurred");
+
                     b.HasIndex("SourceNode", "OccurredAtUtc")
                         .HasDatabaseName("IX_AuditLog_Node_Occurred");