curl --request POST \
  --url https://api.promptloop.com/v0.1/batches/{id}/cancel \
  --header 'x-api-key: <api-key>'

{
  "status": "success",
  "data": {
    "batch_id": "a427201b-2340-4f06-ad68-2da8e0fdb120",
    "cancelled": true,
    "jobs_removed": 5
  },
  "message": "<string>",
  "error": {
    "code": 123,
    "details": "<string>"
  }
}