feat(audit): M5.4 ParentExecutionId tag-cascade for alarm + nested calls (T4)

src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Actors/AlarmActor.cs

@@ -571,7 +571,20 @@ public class AlarmActor : ReceiveActor
     /// Passes the firing alarm's level/priority/message so the script can
     /// branch on severity via the <c>Alarm</c> global.
     /// </summary>
-    private void SpawnAlarmExecution(AlarmLevel level, int priority, string message)
+    /// <param name="level">The firing alarm severity level.</param>
+    /// <param name="priority">The firing alarm priority.</param>
+    /// <param name="message">The firing alarm message.</param>
+    /// <param name="parentExecutionId">
+    /// Audit Log #23 (M5.4 — ParentExecutionId tag-cascade): the execution id of
+    /// the context that fired this alarm, recorded as the on-trigger script run's
+    /// <c>ParentExecutionId</c> so the alarm-triggered run chains under its firing
+    /// context in the audit tree. The alarm subsystem currently has no Guid-typed
+    /// firing id, so the only call sites pass <c>null</c> (the on-trigger run is a
+    /// root). The parameter exists so a future firing-id can flow without
+    /// touching the actor wiring.
+    /// </param>
+    private void SpawnAlarmExecution(
+        AlarmLevel level, int priority, string message, Guid? parentExecutionId = null)
     {
         if (_onTriggerCompiledScript == null) return;
 
@@ -591,7 +604,9 @@ public class AlarmActor : ReceiveActor
             _options,
             _logger,
             // M2.5 (#9): per-script timeout from the on-trigger script (null = global).
-            _onTriggerExecutionTimeoutSeconds));
+            _onTriggerExecutionTimeoutSeconds,
+            // Audit Log #23 (M5.4): the firing context's execution id (null today).
+            parentExecutionId));
 
         Context.ActorOf(props, executionId);
     }