### Documentation
- add README for stack-auth and include it as module docs
- add README for @cipherstash/auth npm package
### Fixes
- remove blank line to satisfy cargo fmt
- update vitaminc imports for 0.1.0-pre4.2 module restructure
### Documentation
- 📝 move token refresh docs and mermaid diagram to public AuthStrategy trait
### Fixes
- 🐛 fix race condition in get_token() when token expires during refresh
### Testing
- ✅ restructure auto_refresh tests into nested scenario modules
### Documentation
- 📝 fix AutoStrategy docs to reference CS_WORKSPACE_CRN not CS_REGION
### Features
- add AutoStrategyBuilder, Option<T> KeyProvider, and SecretKey::from_hex
### Fixes
- 🔥 remove unreleased AutoStrategy::new() deprecated method
- 🩹 remove unnecessary bytes.clone() and improve MissingWorkspaceCrn message
- 🩹 address PR review feedback
### Refactoring
- ♻️ replace with_region with with_workspace_crn and add