Jean-Luc Makiola 50bc11c7ed feat(33-01): add currency conversion service with exchange rate caching ...

- Create currency.service.ts with frankfurter.app ECB rate fetching
- 24h in-memory cache with stale-serve fallback on fetch failure
- convertPrice() handles EUR-base cross-currency conversion
- CURRENCY_MARKET_MAP maps currencies to market regions
- 12 unit tests covering conversion, rounding, unknowns, and mapping

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-13 18:02:06 +02:00

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