Upload document file

Upload a file to associate with a document. Supports two upload methods:

1. Multipart form-data with file field
2. Binary stream with X-Original-Filename header

File validation includes size limits (10MB), MIME type checking, and automatic type detection from file signatures.

curl -X PUT "https://app.orbiqhq.com/api/v1/documents/550e8400-e29b-41d4-a716-446655440000/file" \  -H "X-Original-Filename: privacy-policy.pdf" \  -F file="string"

{
  "success": true,
  "data": {
    "fileId": "file-789",
    "url": "https://directus.example.com/assets/file-789"
  }
}

{
  "error": "document_too_large",
  "details": "File size exceeds 10MB limit"
}

{
  "error": "unsupported_media_type"
}

{
  "error": "file_upload_failed_generic"
}