PurchaseResourceTest::it_translates_e_commerce_columns_into_loan_vocabulary
relied on the real wall clock falling inside the fixture's loan window
(2026-05-14..2026-05-28); once that window passed, the loan resolved to
`overdue` and the test failed. Freeze the clock inside the window like its
sibling tests already do.
Update the README test/assertion badges and the Testing section to the current
suite size (1400 tests, 3755 assertions) after the subscription-checkout tests.
- Added strict types declaration to multiple traits for better type safety.
- Updated method signatures in traits to use nullable types where applicable.
- Improved documentation for traits, including host-model contracts and method descriptions.
- Added new tests to ensure correct behavior of loan checkout and stock management.
- Fixed regression in order number generation to ensure proper string formatting.
- Ensured that currency codes sent to Stripe are consistently lowercased.
Fabian @ Blax Software