Get detailed test result

{
    "isSuccess": true,
    "statusCode": 200,
    "data": {
        "_id": "67aeef90b2c7d32d4f6f4f12",
        "testId": "67aeef90b2c7d32d4f6f4f10",
        "userId": "67aeef90b2c7d32d4f6f4f13",
        "totalScore": 78,
        "level": "B2",
        "completedAt": "2026-02-14T08:21:20.120Z",
        "message": "You are ready for upper-intermediate classes.",
        "answers": [
            {
                "questionId": "67aeef90b2c7d32d4f6f4f91",
                "selectedOptionId": "67aeef90b2c7d32d4f6f4f92",
                "isCorrect": true
            }
        ],
        "user": {
            "id": "67aeef90b2c7d32d4f6f4f13",
            "name": "Jane Doe",
            "email": "jane@example.com"
        },
        "test": {
            "id": "67aeef90b2c7d32d4f6f4f10",
            "title": "English Placement Test",
            "targetLanguage": "en"
        }
    },
    "errors": [
        "Error messages..."
    ],
    "timestamp": "2026-02-14T09:58:22.128Z"
}