feat(siteruntime): thread ParentExecutionId into the routed script's ScriptRuntimeContext

src/ScadaLink.Commons/Messages/ScriptExecution/ScriptCallRequest.cs

@@ -1,7 +1,17 @@
 namespace ScadaLink.Commons.Messages.ScriptExecution;
 
+/// <param name="ParentExecutionId">
+/// Audit Log #23 (ParentExecutionId): the spawning execution's <c>ExecutionId</c>.
+/// For an inbound-API-routed call this is the inbound request's per-request
+/// execution id (carried in from <c>RouteToCallRequest.ParentExecutionId</c>);
+/// the routed script execution records it as its <c>ParentExecutionId</c> so a
+/// spawned execution points back at its spawner. Additive trailing member —
+/// null for normal (tag-change / timer-triggered) runs, nested <c>Script.Call</c>
+/// invocations, and any request built before the field existed.
+/// </param>
 public record ScriptCallRequest(
     string ScriptName,
     IReadOnlyDictionary<string, object?>? Parameters,
     int CurrentCallDepth,
-    string CorrelationId);
+    string CorrelationId,
+    Guid? ParentExecutionId = null);