f08e6397db
- Added `get(path)` support in test `createSettings` to return tiny model setting for `providers.tinyModel`. - Updated `createSettings` in tests to accept optional `tinyModel` with default `"online"`. - Added `flushMicrotasks()` and helper factories for test settings, registry stubs, and online model mocks. - Added tests for `raceFirstNonNull`, `generateSessionTitle` routing, and providers tinyModel enum validation.