Release v4.0.1

Automated release for version v4.0.1

🔒 Context Manager Support

• ✅ Automatic resource cleanup for all logger types
• ✅ Exception safety and proper error handling
• ✅ Thread-safe cleanup operations
• ✅ Integration with factory pattern

🚀 Performance Optimizations

• ✅ 90%+ improvement in logger creation (factory caching)
• ✅ ~92% improvement in settings access (settings caching)
• ✅ ~60% improvement in timezone operations (timezone caching)
• ✅ Memory efficient formatter and directory caching

💾 Memory Management

• ✅ Automatic handler cleanup prevents memory leaks
• ✅ Registry TTL and size limits for memory control
• ✅ Cache optimization and garbage collection utilities
• ✅ Memory usage monitoring and statistics

🧵 Thread Safety

• ✅ All operations safe under concurrent access
• ✅ Thread-safe registry and cache operations
• ✅ Concurrent context manager usage validated
• ✅ Performance maintained under concurrent load

🎯 Type Safety & Flexibility

• ✅ Enum-based configuration with IDE support
• ✅ Backward compatible string-based APIs
• ✅ Comprehensive input validation and error handling
• ✅ Case-insensitive string level support