curl --request POST \
  --url https://api.mixpeek.com/v1/retrievers/{retriever_id}/execute/batch \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "queries": [
    {
      "inputs": {},
      "filters": {}
    }
  ],
  "settings": {},
  "concurrency": 5,
  "return_presigned_urls": false,
  "return_vectors": false,
  "stream": false
}
'

{
  "status": 123,
  "error": {
    "message": "<string>",
    "type": "<string>",
    "code": "<string>",
    "details": {}
  },
  "success": false
}