Post applications aidraft message

{
  "text": "<string>",
  "coverLetterId": "<string>"
}

{
  "defined": true,
  "code": "BAD_REQUEST",
  "status": 400,
  "message": "The application or AI request isn't valid. Check the details and try again.",
  "data": null
}

{
  "defined": true,
  "code": "BAD_GATEWAY",
  "status": 502,
  "message": "The AI provider returned an error or couldn't be reached. Try again, or check its settings.",
  "data": null
}

{
  "defined": true,
  "code": "<string>",
  "status": 1,
  "message": "<string>",
  "data": null
}