Export csv

{
  "downloadUrl": "https://storage.googleapis.com/part3-temp/exports/proj_5f9a3c2e8b/d4f8c2a1-b3e5.csv?X-Goog-Algorithm=...",
  "expiresAt": "2026-04-22T16:15:00Z",
  "rowCount": 412,
  "fileName": "documents-export.csv",
  "totalMatching": 412,
  "truncated": false
}

{
  "error": "Either entity or rows is required"
}

{
  "error": "Either entity or rows is required"
}

{
  "error": "Either entity or rows is required"
}