v4.2.0

v4.2.0

release: 4.2.0 - statutory-holiday awareness: builtin 2026 holiday-cn snapshot (39 rows = 33 rest + 6 make-up), decision-field-only sha256 fingerprint cache under DSH_HOME with self-verify + atomic refresh (jsDelivr primary / raw fallback, hourly ensureFresh, Nov/Dec track next year, 24h budget, fail-open end to end, DSH_SESSION_GUARD_HOLIDAY_FETCH=0 offline pin), weekendMode upgraded to rest-day semantics with 14d table-aware lookahead, holidayMode/holidayAutoFetch declarative switches, status exposure; changelog 8 locales + README holiday section

No CHANGELOG section found for this version; notes auto-derived from the tag commit message.

Release backfilled on 2026-10-22 from git tag + CHANGELOG history.