Adds scripts/rechunk_legacy_precedents.py: selects every case_law with a tiny
chunk (content<50 — the pre-fix chunker fingerprint) and runs
ingest.reindex_case_law (re-chunk+re-embed from stored full_text only, no
re-OCR/LLM, idempotent). Batch-idempotent (re-queries the affected set).
Run result (2026-06-03): 73 precedents reindexed, 0 failed. Tiny chunks
483 -> 4 (99.2%); total precedent_chunks 5019 -> 3115 (fragments merged).
Search verified healthy (substantial coherent passages, no errors).
The 4 residual tiny chunks are isolated section headings ('דיון',
'טענות המשיבים', ...) emitted by the CURRENT (fixed) chunker — not legacy
fragments — and are already filtered at query time (>=50, #55). Minor
chunker edge case, candidate #55 follow-up.
The DB chunk migration is already applied to prod; this commit is the script
+ SCRIPTS.md entry only (no app code change, no deploy needed).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Chaim
434341cc29