1. Apply postprocess shuffle result (pp.options, pp.answer) to final
GeneratedQuestion output instead of using original candidate values.
2. Record dedup rejection in store via new mark_item_rejected() method,
preventing items from staying as 'accepted' after dedup rejects them.
3. Add .flatten() to embed_fn outputs in _is_duplicate and embed_pool
append to handle 2D (1,D) arrays from embedding implementations.
4. Validate exactly 4 options in _validate_parsed_fields (was >= 2),
matching the A-D answer constraint.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Split field validation logic out of _parse_v2_response into a dedicated
_validate_parsed_fields helper. This brings _parse_v2_response from CC=11
(grade C) down to CC=3 (grade A). The extracted validator is CC=9 (grade B).
No grade-C functions remain.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>