curl --request POST \
  --url https://docflow.textin.com/api/app-api/sip/platform/v2/file/upload \
  --header 'Content-Type: multipart/form-data' \
  --header 'x-ti-app-id: <api-key>' \
  --header 'x-ti-secret-code: <api-key>' \
  --form file='@example-file'

{
  "code": 200,
  "msg": "<string>",
  "result": {
    "batch_number": 202412190001,
    "files": [
      {
        "id": 202412190001,
        "name": "invoice.pdf",
        "format": "pdf",
        "task_id": 1981692246135111700
      }
    ]
  }
}