feat(inboundapi): mint inbound ExecutionId early, carry it as RouteToCallRequest.ParentExecutionId

src/ScadaLink.Commons/Messages/InboundApi/RouteToInstanceRequest.cs

@@ -4,12 +4,21 @@ namespace ScadaLink.Commons.Messages.InboundApi;
 /// Request routed from Inbound API to a site to invoke a script on an instance.
 /// Used by Route.To("instanceCode").Call("scriptName", params).
 /// </summary>
+/// <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. The site records it as the routed script execution's
+/// <c>ParentExecutionId</c> so a spawned execution points back at its spawner.
+/// Additive trailing member — null for requests built before the field existed
+/// or for routed calls with no spawning execution (e.g. the Central UI sandbox).
+/// </param>
 public record RouteToCallRequest(
     string CorrelationId,
     string InstanceUniqueName,
     string ScriptName,
     IReadOnlyDictionary<string, object?>? Parameters,
-    DateTimeOffset Timestamp);
+    DateTimeOffset Timestamp,
+    Guid? ParentExecutionId = null);
 
 /// <summary>
 /// Response from a Route.To() call.