review(ControlPlane): fix premature deploy-seal from unexpected-node ack

Review at HEAD 7286d320. ControlPlane-001 (Medium): ConfigPublishCoordinator.HandleAck
now discards acks from nodes not in _expectedAcks (prevented premature SealDeployment) +
regression test. -002 (flipped-node log count), -003 (redundant mapper arms) tidied.

src/Server/ZB.MOM.WW.OtOpcUa.ControlPlane/Coordinators/ConfigPublishCoordinator.cs

@@ -160,6 +160,16 @@ public sealed class ConfigPublishCoordinator : ReceiveActor, IWithTimers
             return;
         }
 
+        // Discard acks from nodes that were not in the expected-ack set at dispatch time.
+        // Without this guard an unexpected-node ack inflates _acks.Count and can trigger a
+        // premature seal/fail before every expected node has actually applied the deployment.
+        if (!_expectedAcks.Contains(msg.NodeId))
+        {
+            _log.Debug("Discarding ApplyAck from unexpected node {Node} for {Id} (not in expected set)",
+                msg.NodeId, msg.DeploymentId);
+            return;
+        }
+
         _acks[msg.NodeId] = msg.Outcome;
         PersistNodeAck(msg);