test(billing): add integration route tests for all billing API endpoints

68 route tests covering admin, merchant, store, and platform billing APIs.
Store tests use real JWT auth (router-level deps can't be overridden);
Stripe-dependent endpoints are mocked at the route module level.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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2026-02-11 23:31:44 +01:00
parent bf5bb69409
commit b265d0db51
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