pub async fn update_grading_with_single_regrading_result(
conn: &mut PgConnection,
exercise: &Exercise,
regrading_submission: &ExerciseTaskRegradingSubmission,
exercise_task_grading: &ExerciseTaskGrading,
exercise_task_grading_result: &ExerciseTaskGradingResult,
file_store: &dyn FileStore,
app_conf: &ApplicationConfiguration,
) -> ModelResult<()>