docs: def worker_failed():
      """Fail worker. Used by bots only for now."""
      participant_id = request.args.get("participant_id")
      if not participant_id:
          return error_response(
              error_type="bad request", error_text="participantId parameter is required"
          )
  
      try:
          _worker_failed(participant_id)
      except KeyError:
          return error_response(
              error_type="ParticipantId not found: {}".format(participant_id)
          )
  
      return success_response(
          field="status", data="success", request_type="worker failed"
      )