portage-ucp-journal

https://github.com/tomtom87/Portage

An append-only, consumer-swappable record of every purchase a Dispatcher completes (store origin, source, product, amount in minor units, order id, idempotency key), built on a small Store interface in the rate_limiter/authenticator mold — the shared persistence seam design-log §22 asks for so a future console or scheduler gem doesn't each grow an incompatible one. Zero runtime dependency on portage-ucp itself; wires in via Dispatcher's optional journal: argument.