lashman e342272dbe Add exchange rate service with caching and fallback API ...

ExchangeRateService fetches rates from fawazahmed0/exchange-api with
Frankfurter API as fallback. Rates are cached in SQLite for 24 hours.
Includes response parsers, 30 supported currencies, and 8 unit tests
covering parsing, caching, and same-currency identity.

2026-03-02 00:14:50 +02:00

25 KiB

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