Add Symfony payload mapping, fixtures, and QA tooling

server/config/services.yaml

@@ -15,6 +15,11 @@ services:
     # this creates a service per class whose id is the fully-qualified class name
     App\:
         resource: '../src/'
+        exclude: '../src/Kernel.php'
+
+    App\Controller\:
+        resource: '../src/Controller/'
+        tags: ['controller.service_arguments']
 
     # add more service definitions when explicit configuration is needed
     # please note that last definitions always *replace* previous ones