curl --request POST \
  --url https://backend.overtenai.com/api/v1/preflight \
  --header 'Content-Type: application/json' \
  --data '
{
  "format": "excel",
  "prompt": "<string>",
  "mode": "action",
  "image_assets": [
    {}
  ],
  "data_sources": [
    {}
  ],
  "context_files": [
    "<unknown>"
  ],
  "brand": {}
}
'

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}