curl --request GET \
  --url https://api.oneinbox.ai/v1/knowledge-bases/{kb_id}/jobs/{job_id} \
  --header 'Authorization: Bearer <token>'

{
  "id": "<string>",
  "error_message": "<string>",
  "payload": {
    "tokens": 123,
    "chunks": 123,
    "vector_indexed": true
  }
}