feat(core) : move user entity into core module and repoint security/doctrine (temp legacy alias)

config/services.yaml

@@ -27,6 +27,9 @@ services:
     # this creates a service per class whose id is the fully-qualified class name
     App\:
         resource: '../src/'
+        # Temporary legacy class_alias bootstrap file (no service): excluded from autowiring scan.
+        exclude:
+            - '../src/Module/Core/_compat_user_alias.php'
 
     # add more service definitions when explicit configuration is needed
     # please note that last definitions always *replace* previous ones