Resolve all high-severity architecture review findings

src/ZB.MOM.WW.ScadaBridge.Host/CentralControlAuthInterceptor.cs

@@ -99,6 +99,7 @@ public sealed class CentralControlAuthInterceptor : Interceptor
         UnaryServerMethod<TRequest, TResponse> continuation)
     {
         await AuthorizeAsync(context).ConfigureAwait(false);
+        if (IsGated(context.Method)) CentralControlSiteIdentity.ValidateRequest(request, context);
         return await continuation(request, context).ConfigureAwait(false);
     }
 
@@ -187,6 +188,8 @@ public sealed class CentralControlAuthInterceptor : Interceptor
                 presented is null ? "no bearer token presented" : "bearer token did not match");
             throw Denied("control plane authentication failed");
         }
+
+        CentralControlSiteIdentity.SetVerified(context, siteId);
     }
 
     private static RpcException Denied(string reason)

src/ZB.MOM.WW.ScadaBridge.Host/Program.cs

@@ -290,6 +290,8 @@ try
         // removed ClusterClient path used to carry, and Asks CentralCommunicationActor — zero handler logic here.
         builder.Services.AddGrpc(options =>
         {
+            options.MaxReceiveMessageSize = ZB.MOM.WW.ScadaBridge.Communication.Grpc.GrpcMessageLimits.MaxMessageBytes;
+            options.MaxSendMessageSize = ZB.MOM.WW.ScadaBridge.Communication.Grpc.GrpcMessageLimits.MaxMessageBytes;
             options.Interceptors.Add<CentralControlAuthInterceptor>();
         });
         builder.Services.AddSingleton<
@@ -824,6 +826,8 @@ try
         // why every environment must carry one before running this build.
         builder.Services.AddGrpc(options =>
         {
+            options.MaxReceiveMessageSize = ZB.MOM.WW.ScadaBridge.Communication.Grpc.GrpcMessageLimits.MaxMessageBytes;
+            options.MaxSendMessageSize = ZB.MOM.WW.ScadaBridge.Communication.Grpc.GrpcMessageLimits.MaxMessageBytes;
             options.Interceptors.Add<LocalDbSyncAuthInterceptor>();
             options.Interceptors.Add<ControlPlaneAuthInterceptor>();
         });