test: add scope attribute to mock request in rest dispatcher tests

Author: guglielmo-san

tests/server/routes/test_rest_dispatcher.py

@@ -101,6 +101,7 @@ def make_mock_request(
     # Needs to be able to build ServerCallContext, so provide .user and .auth etc. if needed
     mock_req.user = MagicMock(is_authenticated=False)
     mock_req.auth = None
+    mock_req.scope = {}
     return mock_req