⚡ Bolt: [성능 향상]

[seonghobae]

💡 What: GrooveMap의 reduce() 및 Math.max() 호출을 네이티브 for 루프로 교체하고, 관련된 내용을 CHANGELOG에 기록했습니다.
🎯 Why: React 렌더링 루프에서 콜백 함수 할당과 반복적인 Math.max() 호출로 인한 O(N) 오버헤드를 방지하기 위함입니다.
📊 Impact: 렌더링 시 실행 속도가 빨라지고 메모리 오버헤드가 감소합니다.
🔬 Measurement: 많은 노트를 렌더링할 때 React 프로파일러에서 CPU 및 메모리 사용량이 감소하는 것을 확인할 수 있습니다.

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PR created automatically by Jules for task 12855811571673923593 started by @seonghobae

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