more cleanup

Author: rysweet

dotnet/samples/Hello/Program.cs

@@ -9,6 +9,7 @@
     Message = "World"
 }, local: true);
 
+await App.RuntimeApp!.WaitForShutdownAsync();
 await app.WaitForShutdownAsync();
 
 [TopicSubscription("HelloAgents")]

dotnet/samples/Hello/appsettings.Development.json

@@ -47,6 +47,7 @@ public static async ValueTask ShutdownAsync()
         {
             throw new InvalidOperationException("Client not started");
         }
+        await RuntimeApp!.StopAsync();
         await ClientApp.StopAsync();
     }
 }