Adds scripts/i18n/check-translation-drift.mjs — a deterministic CI gate that
verifies every source recorded in .i18n-state.json still hashes to the same
SHA-256 on disk and every produced translation target exists with its
recorded hash. No API calls.
Modes: --strict (default, exit 1 on any drift), --warn (exit 0 with report),
--json (machine-readable report).
Also adds three npm scripts:
- i18n:run run the translator (incremental, hash-based)
- i18n:run:dry preview what would happen (no API calls, no writes)
- i18n:check drift checker (used in CI / pre-merge)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
