feat(site-runtime): add SourceNode column to OperationTracking + thread through RecordEnqueueAsync

src/ScadaLink.Commons/Interfaces/IOperationTrackingStore.cs

@@ -40,6 +40,7 @@ public interface IOperationTrackingStore
         string? targetSummary,
         string? sourceInstanceId,
         string? sourceScript,
+        string? sourceNode,
         CancellationToken ct = default);
 
     /// <summary>

src/ScadaLink.Commons/Types/TrackingStatusSnapshot.cs

@@ -25,6 +25,11 @@ namespace ScadaLink.Commons.Types;
 /// <param name="TerminalAtUtc">UTC timestamp the row reached a terminal status; null while still active.</param>
 /// <param name="SourceInstanceId">Instance id that issued the cached call, when known.</param>
 /// <param name="SourceScript">Script that issued the cached call, when known.</param>
+/// <param name="SourceNode">
+/// Cluster node that submitted the cached call (e.g. <c>"node-a"</c> /
+/// <c>"node-b"</c>), captured at enqueue time. Null on rows persisted before
+/// the SourceNode stamping migration; stamping itself is wired in a later task.
+/// </param>
 public sealed record TrackingStatusSnapshot(
     TrackedOperationId Id,
     string Kind,
@@ -37,4 +42,5 @@ public sealed record TrackingStatusSnapshot(
     DateTime UpdatedAtUtc,
     DateTime? TerminalAtUtc,
     string? SourceInstanceId,
-    string? SourceScript);
+    string? SourceScript,
+    string? SourceNode);