fix(site-runtime): resolve SiteRuntime-004..011 — deploy-after-persist, remove reflection, deterministic IDs, non-blocking startup, dedicated script scheduler, config-change detection, semantic trust-model check

src/ScadaLink.SiteRuntime/Actors/ScriptExecutionActor.cs

@@ -68,8 +68,13 @@ public class ScriptExecutionActor : ReceiveActor
     {
         var timeout = TimeSpan.FromSeconds(options.ScriptExecutionTimeoutSeconds);
 
+        // SiteRuntime-009: run the script body on the dedicated script-execution
+        // scheduler, not the shared .NET thread pool, so blocking script I/O cannot
+        // starve the global pool and stall Akka dispatchers / HTTP handling.
+        var scheduler = ScriptExecutionScheduler.Shared(options);
+
         // CTS must be created inside the async lambda so it outlives this method
-        _ = Task.Run(async () =>
+        _ = Task.Factory.StartNew(async () =>
         {
             IServiceScope? serviceScope = null;
             // ISiteEventLogger is a singleton; resolve from the root provider so
@@ -164,6 +169,6 @@ public class ScriptExecutionActor : ReceiveActor
                 // Stop self after execution completes
                 self.Tell(PoisonPill.Instance);
             }
-        });
+        }, CancellationToken.None, TaskCreationOptions.DenyChildAttach, scheduler).Unwrap();
     }
 }