Release version 1.5.0 - PSR-4 Architecture Migration 🎉 MAJOR RELEASE: Complete PSR-4 Architecture Migration ✅ 60+ classes migrated to PSR-4 ✅ 100% backward compatible (class names) ⚠️ BREAKING: Requires PHP 8.1+ (was 7.4+) ✅ All tests passing ✅ Production ready See CHANGELOG.md for full details.