test: fixed annotation

tests/test_consensus.py

@@ -331,6 +331,7 @@ class TestConsensusTool:
         result = tool.customize_workflow_response(response_data, request)
         assert result["consensus_workflow_status"] == "ready_for_synthesis"
 
+    @pytest.mark.asyncio
     async def test_consensus_with_relevant_files_model_context_fix(self):
         """Test that consensus tool properly handles relevant_files without RuntimeError.