🛡️ Sentinel: [MEDIUM] readline() 입력값에 대한 엄격한 정규식 검증 적용

[seonghobae]

🚨 Severity: MEDIUM
💡 Vulnerability: readline() 대화형 프롬프트에서 ^[0-9]+$ 정규식을 사용하여 입력값을 검증할 때, 너무 큰 숫자가 입력되면 as.integer() 호출 시 NA로 변환되어 후속 논리 로직에서 오류 및 비정상 종료를 유발할 수 있는 타입 변환 취약점이 발견되었습니다.
🎯 Impact: 악의적 또는 실수로 비정상적인 값을 입력할 경우 패키지 런타임에 에러(DoS)가 발생할 수 있습니다.
🔧 Fix: grepl("^[0-9]+$", n) 로직을 grepl("^[12]$", n) 으로 변경하여 예상되는 1과 2 입력만 엄격히 허용하도록 강화했습니다.
✅ Verification: AFIPC_ENABLE_PACKRAT=true Rscript -e "testthat::test_dir('tests/testthat')"를 통해 모든 테스트 케이스가 성공적으로 패스됨을 확인했습니다.

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PR created automatically by Jules for task 17020588906424488603 started by @seonghobae

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• .jules/sentinel.md
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✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.