fix(communication): resolve Communication-004..008 — Resume supervision, gRPC option wiring, address-load logging, sync dispose, flap detection

src/ScadaLink.Communication/Actors/SiteCommunicationActor.cs

@@ -177,6 +177,24 @@ public class SiteCommunicationActor : ReceiveActor, IWithTimers
 
     }
 
+    /// <summary>
+    /// Coordinator supervision strategy (CLAUDE.md: "Resume for coordinator actors").
+    /// SiteCommunicationActor is a long-lived coordinator routing all message
+    /// patterns to local handlers; a transient fault in a child must Resume so the
+    /// child's in-memory state is preserved rather than discarded by a Restart.
+    /// </summary>
+    protected override SupervisorStrategy SupervisorStrategy()
+    {
+        return new OneForOneStrategy(
+            maxNrOfRetries: -1,
+            withinTimeRange: Timeout.InfiniteTimeSpan,
+            decider: Decider.From(ex =>
+            {
+                _log.Warning(ex, "Child actor of SiteCommunicationActor faulted, resuming (state preserved)");
+                return Directive.Resume;
+            }));
+    }
+
     protected override void PreStart()
     {
         _log.Info("SiteCommunicationActor started for site {0}", _siteId);