DocumentResponse

{
    "document_id": 0,
    "filename": "string",
    "file_type": "string",
    "file_size": 0,
    "status": "pending",
    "chunk_count": 0,
    "error_message": null,
    "is_selected": false,
    "created_at": "string",
    "updated_at": "string"
}