kevin-asprec df4a467a38 docs(02-04): complete billing engine plan ...

Tasks completed: 2/2
- Task 1: Invoice model + BillingService + InvoiceService + CreditService
- Task 2: Billing API routes + comprehensive tests (38 passing)

SUMMARY: .planning/phases/02-subscriber-and-billing-core/02-04-SUMMARY.md

2026-03-04 23:41:50 +08:00

..

01-foundation

docs(01): complete Foundation phase

2026-03-04 19:22:00 +08:00

02-subscriber-and-billing-core

docs(02-04): complete billing engine plan

2026-03-04 23:41:50 +08:00