- add currencyadapter.js: list (with pagination+keyword), detail, history, create, update (auto-log rate change to tbl_currency_log), delete (soft), convertAmount helper - add controllers/currency.js and routes/currency.js, auto-mounted at /currency - update dbproc.js: configurable port via HOSTPORT env variable Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>