feat(audit): M5.2 per-node stuck-count KPIs (T6) — repo per-node aggregation, actor message pair, CentralUI tiles

src/ZB.MOM.WW.ScadaBridge.Commons/Types/Audit/SiteCallNodeKpiSnapshot.cs

@@ -0,0 +1,37 @@
+namespace ZB.MOM.WW.ScadaBridge.Commons.Types.Audit;
+
+/// <summary>
+/// Point-in-time <c>SiteCalls</c> metrics scoped to a single originating node. The
+/// per-node counterpart of <see cref="SiteCallSiteKpiSnapshot"/>; surfaced in the
+/// per-node breakdown table on the Site Calls KPIs page. Mirrors
+/// <see cref="ZB.MOM.WW.ScadaBridge.Commons.Types.Notifications.NodeNotificationKpiSnapshot"/>.
+/// </summary>
+/// <param name="SourceNode">
+/// The node identifier these metrics are scoped to (e.g. <c>node-a</c>,
+/// <c>node-b</c>). Rows with a <c>NULL</c> <c>SourceNode</c> are omitted.
+/// </param>
+/// <param name="BufferedCount">Count of this node's non-terminal rows (<c>TerminalAtUtc IS NULL</c>).</param>
+/// <param name="ParkedCount">Count of this node's rows in the <c>Parked</c> status.</param>
+/// <param name="FailedLastInterval">
+/// Count of this node's <c>Failed</c> rows whose <c>TerminalAtUtc</c> is at or
+/// after the "since" timestamp.
+/// </param>
+/// <param name="DeliveredLastInterval">
+/// Count of this node's <c>Delivered</c> rows whose <c>TerminalAtUtc</c> is at
+/// or after the "since" timestamp.
+/// </param>
+/// <param name="OldestPendingAge">
+/// Age of this node's oldest non-terminal row, or <c>null</c> when it has none.
+/// </param>
+/// <param name="StuckCount">
+/// Count of this node's non-terminal rows whose <c>CreatedAtUtc</c> is older
+/// than the stuck cutoff.
+/// </param>
+public sealed record SiteCallNodeKpiSnapshot(
+    string SourceNode,
+    int BufferedCount,
+    int ParkedCount,
+    int FailedLastInterval,
+    int DeliveredLastInterval,
+    TimeSpan? OldestPendingAge,
+    int StuckCount);

src/ZB.MOM.WW.ScadaBridge.Commons/Types/Notifications/NodeNotificationKpiSnapshot.cs

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+namespace ZB.MOM.WW.ScadaBridge.Commons.Types.Notifications;
+
+/// <summary>
+/// Point-in-time notification-outbox metrics scoped to a single originating node.
+/// The per-node counterpart of <see cref="SiteNotificationKpiSnapshot"/>; surfaced
+/// in the per-node breakdown table on the Notification KPIs page.
+/// </summary>
+/// <param name="SourceNode">
+/// The node identifier these metrics are scoped to (e.g. <c>node-a</c>,
+/// <c>node-b</c>). Rows with a <c>NULL</c> <c>SourceNode</c> are omitted.
+/// </param>
+/// <param name="QueueDepth">Count of this node's non-terminal rows (Pending + Retrying).</param>
+/// <param name="StuckCount">
+/// Count of this node's non-terminal rows whose <c>CreatedAt</c> is older than the stuck cutoff.
+/// </param>
+/// <param name="ParkedCount">Count of this node's rows in the Parked status.</param>
+/// <param name="DeliveredLastInterval">
+/// Count of this node's Delivered rows whose <c>DeliveredAt</c> is at or after the
+/// "delivered since" timestamp.
+/// </param>
+/// <param name="OldestPendingAge">
+/// Age of this node's oldest non-terminal row, or <c>null</c> when it has none.
+/// </param>
+public record NodeNotificationKpiSnapshot(
+    string SourceNode,
+    int QueueDepth,
+    int StuckCount,
+    int ParkedCount,
+    int DeliveredLastInterval,
+    TimeSpan? OldestPendingAge);