v0.2.0

v0.2.0 - Major audit fixes and new features

Critical Fixes:
- BatchTransport buffer leak
- Namespace regex DoS
- React useLogger stale closure
- Child logger correlationId

New Features:
- AsyncLocalStorage context propagation
- Rate limiting transports
- Testing utilities module
- Value-based redaction (SSN, credit cards)
- Logger.dispose() method

All 194 tests passing.