feat(site): replicate config by id + standby fetch (kills the intra-site frame trap)

src/ZB.MOM.WW.ScadaBridge.Host/Actors/AkkaHostedService.cs

@@ -819,6 +819,14 @@ akka {{
         var siteHealthCollector = _serviceProvider.GetService<ZB.MOM.WW.ScadaBridge.HealthMonitoring.ISiteHealthCollector>();
         siteHealthCollector?.SetNodeHostname(_nodeOptions.NodeHostname);
 
+        // Notify-and-fetch: the deployment config fetcher pulls a deployment's flattened
+        // config from central over HTTP. Used by BOTH the active singleton
+        // (RefreshDeploymentCommand, Task 10) AND the standby replication path — the active
+        // node now replicates only the deployment id and the standby fetches the config
+        // itself, so a large config never crosses the intra-site Akka hop. Resolve once.
+        var deploymentConfigFetcher =
+            _serviceProvider.GetService<ZB.MOM.WW.ScadaBridge.SiteRuntime.Deployment.IDeploymentConfigFetcher>();
+
         // Create SiteReplicationActor on every node (not a singleton)
         var sfStorage = _serviceProvider.GetRequiredService<StoreAndForwardStorage>();
         var replicationService = _serviceProvider.GetRequiredService<ReplicationService>();
@@ -827,7 +835,8 @@ akka {{
 
         var replicationActor = _actorSystem!.ActorOf(
             Props.Create(() => new SiteReplicationActor(
-                storage, sfStorage, replicationService, siteRole, replicationLogger)),
+                storage, sfStorage, replicationService, siteRole, replicationLogger,
+                deploymentConfigFetcher)),
             "site-replication");
 
         // Wire S&F replication handler to forward operations via the replication actor
@@ -839,12 +848,6 @@ akka {{
 
         _logger.LogInformation("SiteReplicationActor created and S&F replication handler wired");
 
-        // Notify-and-fetch (Task 10): the active singleton fetches a deployment's
-        // flattened config from central over HTTP when a RefreshDeploymentCommand
-        // arrives. Resolve the fetcher from the same provider the actor already uses.
-        var deploymentConfigFetcher =
-            _serviceProvider.GetService<ZB.MOM.WW.ScadaBridge.SiteRuntime.Deployment.IDeploymentConfigFetcher>();
-
         // Create the Deployment Manager as a cluster singleton
         var singletonProps = ClusterSingletonManager.Props(
             singletonProps: Props.Create(() => new DeploymentManagerActor(