fix(tests): address audit findings — assertion consistency, JSDoc, DRY, try/finally

fix(tests): address audit findings — assertion consistency, JSDoc, DRY, try/finally

- Replace expect(a === b).toBe(false) with expect(a).not.toBe(b) (IdTagsCache)
- Add explicit assertions to smoke tests (SimpleHandlers)
- Wrap state injection in try/finally (Configuration)
- Extract createStationWithRequestHandler helper, use mock.method() (connectorStatus)
- Fill empty JSDoc @param descriptions across 5 files
- Rename makeStationStub → makeStationMock, merge duplicate import (pure)
- Fix misleading test name 'is empty' → 'is null' (validation)
- Extract getConnectorStatus/getHandleStartTransactionResponse helpers (ATG)
- Fix perfectionist/sort-modules and sort-imports ordering