curl --request POST \
  --url https://api.siliconflow.cn/v1/files \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: multipart/form-data' \
  --form purpose=batch

{
  "code": 20000,
  "message": "Ok",
  "status": true,
  "data": {
    "id": "file-jkvytbjtow",
    "object": "file",
    "bytes": 8509,
    "createdAt": 1741685396,
    "filename": "requests.jsonl",
    "purpose": "batch"
  }
}