fix(test): Add mock db query chain to test_start_test_no_artifact_found

Add create_mock_db_query helper to avoid AsyncMock behavior in
Python 3.12+ that causes 'coroutine object has no attribute filter'.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: cfsmp3

tests/test_ci/test_controllers.py

@@ -2060,6 +2060,10 @@ def test_start_test_no_artifact_found(self, mock_log, mock_gcp_instance,
         g.db.add(customized_test)
         g.db.commit()
 
+        # Set up mock db query chain to avoid AsyncMock behavior in Python 3.13+
+        mock_query = create_mock_db_query(mock_g)
+        mock_query.c.got = MagicMock()
+
         start_test(mock.ANY, self.app, mock_g.db, repository, test, mock.ANY)
 
         # Should log critical with diagnostic message and mark test failed