WR-02: Confirm and SetScore answer ErrAttemptOpen (409 attempt_open,
an admin refusal) for an answer of a running test, ConfirmBulk skips
such attempts, and the default open queue leaves them out, so
AnswerReviewed never fires before the test ends.
- Do oceny admin screen (golem15.quizzes.reviews) over the open answers,
with a read-only context partial, score and comment virtual fields saved
through SetScore, confirm and regrade record actions, bulk confirm
- open question type, rubric and max_length in the question form; grader
dropdown on the quiz form from the grader registry
- Review model with quiz, status and student filters
