perf(deploy): flatten-session caching, bulk DeploySiteAsync, paged management queries

src/ZB.MOM.WW.ScadaBridge.Commons/Types/Deployment/DeploymentRecordSummary.cs

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+using ZB.MOM.WW.ScadaBridge.Commons.Types.Enums;
+
+namespace ZB.MOM.WW.ScadaBridge.Commons.Types.Deployment;
+
+/// <summary>
+/// Row-shaped projection of a <c>DeploymentRecord</c> for list surfaces (CLI
+/// <c>deploy list</c> / <c>instance</c> history, the Central UI deployment-status
+/// page).
+///
+/// <para>
+/// Exists so a deployment listing can be paged and filtered in the DATABASE.
+/// Deployment records are insert-only — one row per deploy attempt, retained for
+/// the configured retention window — so the previous "load the whole table, then
+/// filter in memory" read path degraded with the age of the system rather than
+/// with the size of the requested page.
+/// </para>
+///
+/// <para>
+/// The <c>RowVersion</c> optimistic-concurrency token is deliberately absent: this
+/// is a READ projection, and a summary must never be mistaken for something that
+/// can be written back. Mutating paths keep loading the tracked entity.
+/// </para>
+///
+/// <para>
+/// Message-contract evolution rule: additive-only. New fields go on the end with a
+/// default.
+/// </para>
+/// </summary>
+/// <param name="Id">Deployment record row id.</param>
+/// <param name="DeploymentId">The logical deployment id (GUID, "N" format).</param>
+/// <param name="InstanceId">Instance the deployment targeted.</param>
+/// <param name="Status">Terminal or in-flight deployment status.</param>
+/// <param name="RevisionHash">Revision hash of the deployed configuration.</param>
+/// <param name="DeployedBy">User who initiated the deployment.</param>
+/// <param name="DeployedAt">When the deployment was initiated.</param>
+/// <param name="CompletedAt">When the deployment reached a terminal status, if it has.</param>
+/// <param name="ErrorMessage">Failure detail when the deployment did not succeed.</param>
+public record DeploymentRecordSummary(
+    int Id,
+    string DeploymentId,
+    int InstanceId,
+    DeploymentStatus Status,
+    string? RevisionHash,
+    string DeployedBy,
+    DateTimeOffset DeployedAt,
+    DateTimeOffset? CompletedAt,
+    string? ErrorMessage)
+{
+    /// <summary>
+    /// Hard ceiling applied to a requested page size, mirroring the in-memory
+    /// <c>Page</c> clamp the management actor already applies elsewhere.
+    /// </summary>
+    public const int MaxPageSize = 1000;
+}

src/ZB.MOM.WW.ScadaBridge.Commons/Types/Templates/TemplateGraphWatermark.cs

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+using System.Collections.Concurrent;
+using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Services;
+
+namespace ZB.MOM.WW.ScadaBridge.Commons.Types.Templates;
+
+/// <summary>
+/// In-memory <see cref="ITemplateGraphWatermark"/>. Registered as a singleton so
+/// the writer (the configuration-database repository's unit-of-work commit) and
+/// the readers (the flatten-session cache, the staleness fast path) observe the
+/// same counters within a process.
+///
+/// <para>
+/// Lives in Commons rather than a component project because both the
+/// ConfigurationDatabase writer and the DeploymentManager readers need it and
+/// neither references the other. It is a pure in-memory primitive with no
+/// infrastructure dependency, so it does not violate the "implementations live
+/// with their component" convention the way a repository would.
+/// </para>
+///
+/// <para>
+/// All counters are <see cref="Interlocked"/>-updated and the per-id maps are
+/// <see cref="ConcurrentDictionary{TKey,TValue}"/>, so concurrent management
+/// commands (which each run on their own DI scope) can bump safely. Reads are
+/// deliberately unsynchronised relative to each other: a reader that observes a
+/// half-applied batch of bumps sees a CHANGED value for at least one member,
+/// which invalidates rather than falsely validates a cache entry.
+/// </para>
+/// </summary>
+public sealed class TemplateGraphWatermark : ITemplateGraphWatermark
+{
+    private readonly ConcurrentDictionary<int, long> _templateVersions = new();
+    private readonly ConcurrentDictionary<int, long> _instanceVersions = new();
+    private long _global;
+    private long _structure;
+
+    /// <inheritdoc />
+    public long Global => Interlocked.Read(ref _global);
+
+    /// <inheritdoc />
+    public long StructureVersion => Interlocked.Read(ref _structure);
+
+    /// <inheritdoc />
+    public long GetTemplateVersion(int templateId) =>
+        _templateVersions.TryGetValue(templateId, out var v) ? v : 0L;
+
+    /// <inheritdoc />
+    public long GetInstanceVersion(int instanceId) =>
+        _instanceVersions.TryGetValue(instanceId, out var v) ? v : 0L;
+
+    /// <inheritdoc />
+    public void BumpTemplate(int templateId, bool structural = false)
+    {
+        _templateVersions.AddOrUpdate(templateId, 1L, static (_, current) => current + 1);
+        Interlocked.Increment(ref _global);
+        if (structural)
+            Interlocked.Increment(ref _structure);
+    }
+
+    /// <inheritdoc />
+    public void BumpInstance(int instanceId)
+    {
+        _instanceVersions.AddOrUpdate(instanceId, 1L, static (_, current) => current + 1);
+        Interlocked.Increment(ref _global);
+    }
+
+    /// <inheritdoc />
+    public void BumpAll()
+    {
+        Interlocked.Increment(ref _global);
+        Interlocked.Increment(ref _structure);
+    }
+}

src/ZB.MOM.WW.ScadaBridge.Commons/Types/Templates/TemplateSummary.cs

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+namespace ZB.MOM.WW.ScadaBridge.Commons.Types.Templates;
+
+/// <summary>
+/// Row-shaped projection of a template for list surfaces (CLI <c>template list</c>,
+/// the Central UI template tree, the <c>ListTemplates</c> management command).
+///
+/// <para>
+/// Exists so a template listing can be paged in the DATABASE rather than by
+/// materialising every template's full child graph — attributes, alarms, script
+/// bodies, compositions and native alarm sources — and then discarding all but
+/// one page of it in memory. Child collections are reduced to counts, which is
+/// what every list surface actually renders.
+/// </para>
+///
+/// <para>
+/// Message-contract evolution rule: this record is additive-only. New fields go
+/// on the end with a default so an older peer deserialising a newer payload is
+/// unaffected.
+/// </para>
+/// </summary>
+/// <param name="Id">Template id.</param>
+/// <param name="Name">Template name.</param>
+/// <param name="Description">Optional description.</param>
+/// <param name="ParentTemplateId">Parent template id when this template inherits.</param>
+/// <param name="FolderId">Containing folder id.</param>
+/// <param name="IsDerived">True when the template was auto-derived to back a composition slot.</param>
+/// <param name="OwnerCompositionId">Owning composition row for a derived template.</param>
+/// <param name="AttributeCount">Number of directly declared attributes.</param>
+/// <param name="AlarmCount">Number of directly declared alarms.</param>
+/// <param name="ScriptCount">Number of directly declared scripts.</param>
+/// <param name="CompositionCount">Number of composition slots.</param>
+/// <param name="NativeAlarmSourceCount">Number of native alarm source bindings.</param>
+public record TemplateSummary(
+    int Id,
+    string Name,
+    string? Description,
+    int? ParentTemplateId,
+    int? FolderId,
+    bool IsDerived,
+    int? OwnerCompositionId,
+    int AttributeCount,
+    int AlarmCount,
+    int ScriptCount,
+    int CompositionCount,
+    int NativeAlarmSourceCount)
+{
+    /// <summary>
+    /// Hard ceiling applied to a requested page size, mirroring the existing
+    /// in-memory <c>Page</c> clamp in the management actor so DB-side paging
+    /// cannot be used to pull an unbounded result set.
+    /// </summary>
+    public const int MaxPageSize = 1000;
+}