Eval harness for AQA A-level + GCSE-science image-only papers: finalize.py --b1-only,
RapidOCR runner (rapid_pass.py via dsync), GT fixtures (make_b1_gt.py + b1_gt_labels.json),
and fetch_b1_corpus.py to pull the eval corpus from .94 cc.examboards at runtime.
Salvaged from t_15be12ed (which timed out on iteration budget re-running OCR): exam PDFs and
generated OCR caches/reports are NOT committed (third-party copyright + reproducible) — gitignored
and fetched/generated at runtime. Baseline coverage recorded in the task evidence file.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Add synthesize_part_box() as the single authoritative S5 part-box projection
(T3 swap point): content-margin x-extent x part-band y-extent, BOTTOMLEFT
coords; label_box retained as a separate anchor. build() attaches box per part.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
