Ingest the AMENDMENTS NOT IN FORCE schedules as bannered pending law

Corpus hygiene + coverage batch: drop amendment stubs, add 8 instruments, currency & guidance fixes

refresh.py: add upstream staleness checks for the delegation instruments

Sub-chunk long sections so their tails become searchable (Phase 4)

Add per-section in-force dates and repealed-provision flagging (Phase 3)

Add canlex/refresh.py --check: corpus staleness detection (Phase 2)

Add the public-service benefit-plan member booklets (new doc_type 'benefits')

Sweep-tune the regulation and back-matter penalties; revert the failed swap

Co-surface a directive's cited appendices into search results

Add IRPA delegation instruments, R. v. Carignan, and retrieval polish