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

src/ScadaLink.SiteRuntime/Actors/InstanceActor.cs

@@ -320,7 +320,10 @@ public class InstanceActor : ReceiveActor
     {
         if (_scriptActors.TryGetValue(request.ScriptName, out var scriptActor))
         {
-            // Forward the request to the Script Actor, preserving the original sender
+            // Forward the request to the Script Actor, preserving the original
+            // sender. The whole record is forwarded unchanged, so any
+            // ParentExecutionId (Audit Log #23) set by an inbound-API-routed
+            // call is carried through to the Script Actor verbatim.
             scriptActor.Forward(request);
         }
         else