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/ScriptActor.cs

@@ -286,9 +286,10 @@ public class ScriptActor : ReceiveActor, IWithTimers
     {
         var executionId = $"{_scriptName}-exec-{_executionCounter++}";
 
-        // NOTE: In production, configure a dedicated blocking I/O dispatcher via HOCON:
-        //   akka.actor.script-execution-dispatcher { type = PinnedDispatcher }
-        // and chain .WithDispatcher("akka.actor.script-execution-dispatcher") below.
+        // SiteRuntime-009: the actor's mailbox stays on the default dispatcher, but the
+        // script body itself runs on the dedicated ScriptExecutionScheduler (a bounded
+        // set of dedicated threads), so blocking script I/O is contained there and
+        // cannot starve the shared .NET thread pool.
         var props = Props.Create(() => new ScriptExecutionActor(
             _scriptName,
             _instanceName,