v2.2 - Performance Optimization

What's Changed

Performance Improvements 🚀

• Optimized render updates: Card now only re-renders when configured entities actually change state, not on every Home Assistant state update
• Change detection: Added _hasEntitiesChanged() method to intelligently compare entity states between updates
• Dramatic performance improvement: Eliminates unnecessary re-renders in systems with many entities updating frequently

Fixed

• Performance issue where card re-rendered on every HA state update (#1)

Credits

• Thanks to @andyp05 for reporting this issue and providing the initial optimized implementation approach

Full Changelog: v2.1...v2.2