⚡ Bolt: 정규 표현식 실행 전 isalnum()을 이용한 빠른 경로 최적화

[seonghobae]

💡 What: transcript_search.py의 tokenize 함수에 순수 영숫자 문자열에 대한 str.isalnum() 빠른 경로(fast-path) 처리를 추가했습니다.
🎯 Why: 정규 표현식은 실행 오버헤드가 크므로, 단일 영숫자 단어와 같이 단순한 경우 정규 표현식 실행을 생략하여 CPU 시간을 절약하기 위함입니다. 빈 문자열인 경우도 고려하여 lower가 참인지 확인합니다. 해당 로직에 대해 주석도 추가했습니다.
📊 Impact: 정규 표현식 실행을 건너뛰어 순수 영숫자 문자열에 대한 토큰화 성능이 크게 향상됩니다.
🔬 Measurement: timeit 모듈을 통한 토큰화 벤치마크 및 제공된 테스트 스위트를 통해 성능 개선과 정확성을 검증할 수 있습니다.

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PR created automatically by Jules for task 4239523878169279883 started by @seonghobae

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📥 Commits

Reviewing files that changed from the base of the PR and between 963291f and 995bd1c.

📒 Files selected for processing (2)

• .jules/bolt.md
• transcript_search.py

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