All 29 call sites now use app.timeutil.utcnow(), which returns naive
UTC via the non-deprecated API. Semantics are unchanged on purpose:
every datetime column is TIMESTAMP WITHOUT TIME ZONE, so going aware
here would poison naive/aware comparisons. The TIMESTAMPTZ migration
(Phase 2) now has a single place to change. (BE-01)
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Backend now stores user settings (dashboard config) in a JSONB column and
exposes CRUD via /settings/. Exchange rate service gains multiple fallback
providers (ExchangeRate-API, currency-api, FloatRates) so USD/CRC rates
stay available when BCCR is down.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
