When running the httpx crawler on v0.3.7
My request_dict
'{"url": "XXXXXX", "unique_key": "YYYYY", "method": "GET", "headers": {}, "query_params": {}, "data": {}, "user_data": {"__crawlee": {"state": "RequestState.ERROR_HANDLER"}}, "retry_count": 1, "no_retry": false, "id": "doOfa0tGsjBwT90"}'

create the exception below when running Request.model_validate(request_dict)

user_data.__crawlee.state
  Input should be 0, 1, 2, 3, 4, 5, 6 or 7 [type=enum, input_value='RequestState.ERROR_HANDLER', input_type=str]
    For further information visit https://errors.pydantic.dev/2.9/v/enum