{
    "timestamp": "2026-09-17 11:57:47",
    "level": "INFO",
    "data": {
        "event": "job_started",
        "grading_id": 22
    }
}
{
    "timestamp": "2026-09-17 11:57:47",
    "level": "ERROR",
    "data": {
        "event": "process_failed",
        "grading_id": 22,
        "error": "Không tìm thấy binary dm."
    }
}
{
    "timestamp": "2026-09-17 11:57:47",
    "level": "ERROR",
    "data": {
        "event": "job_finished",
        "grading_id": 22,
        "status": "failed",
        "score": null
    }
}