- Replace manual constructor-based dependency injection with SutProvider<T>
- Add [SutProviderCustomize] attribute to test class
- Update all 25+ test methods to use sutProvider parameter
- Handle FakeLogger special case with SetDependency<ILogger>()
- Update CLAUDE.md with SutProvider advanced usage documentation
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>