* perf(sqlite): gate schema version before integrity scans and quarantine terminal open failures
* feat(gateway): refuse incompatible database schemas at boot and verify integrity in the background
* feat(update): refuse installing builds that cannot open the current databases
* docs: add database schema reference with version history and downgrade guidance
* test(update): tolerate optional runner options in git-mutation mocks
* refactor(update): split npm package-target metadata out of update-check
* chore: model verifier internals for knip and regenerate docs map
* chore(i18n): resync stale iOS localization catalog
* chore: allowlist read-only preflight and verifier raw SQLite access
