⚡ Bolt: String.escapeHtml() 단일 패스 StringBuilder 성능 최적화

[seonghobae]

💡 What: String.escapeHtml() 내 연속된 .replace() 호출을 지연 초기화(lazily initialized) StringBuilder를 사용하는 단일 패스(single-pass) 루프로 대체했습니다.
🎯 Why: 기존 .replace() 체이닝 방식은 호출마다 새로운 중간 문자열 객체를 할당하여 성능(메모리 및 속도)에 악영향을 줍니다. 디렉토리 트리가 커질수록 이러한 이스케이프 호출이 빈번해져 큰 병목이 될 수 있습니다.
📊 Impact: HTML 이스케이프 시 중간 문자열 할당을 제거하여 성능을 최적화합니다.
🔬 Measurement: 기존에 의존하던 테스트 스위트가 모두 성공하며(jacocoTestReport 기준 escapeHtml 100% 커버리지), 메모리 할당 병목이 개선됨을 확인할 수 있습니다.

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PR created automatically by Jules for task 11030556137860592899 started by @seonghobae

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