12 new tests: search by email/phone, pagination params, sort order,
billing mode, scoped member list, isMinor from DOB, DOB override,
isMinor recalculation on update, 404 for missing member. Total: 36.
Custom test framework that starts the backend, creates a test DB, runs
migrations, and hits real HTTP endpoints. Supports --suite and --tag
filtering. 24 tests covering account CRUD, member inheritance, state
normalization, move, search, and auto-generated numbers. Run with
bun run api-test.
