🛡️ Sentinel: [MEDIUM] Fix unhandled state exception in model failures

[seonghobae]

🚨 Severity: MEDIUM
💡 Vulnerability: try() 블록을 통한 모델 추정 과정에서 오류가 발생해 모델 객체(oldFormModel, newFormModel, LinkedModel)가 생성되지 않았을 때, 해당 객체의 존재 여부를 확인하지 않고 내부 속성(@OptimInfo$secondordertest)에 접근하여 런타임 예외("object not found")가 발생하고 시스템의 내부 상태가 누출될 위험이 있었습니다.
🎯 Impact: 자동화된 워크플로우나 CI/CD 파이프라인 등 모델 추정이 간헐적으로 실패하는 환경에서 애플리케이션의 강제 종료가 발생하거나 예기치 않은 오류 로그로 인해 민감한 디버깅 정보가 노출될 수 있습니다.
🔧 Fix: 객체의 속성에 접근하기 전 짧은 순환 방식(short-circuit evaluation)을 이용해 객체의 존재 여부(exists())를 먼저 확인하도록 변경했습니다. isTRUE()를 활용하여 해당 속성이 없거나 NULL인 경우의 에러 방지 처리도 포함되었습니다.
✅ Verification: 단위 테스트(tests/testthat/)를 모두 통과하였으며, !exists(...) || !isTRUE(...) 구조가 올바르게 작동하는지 확인 완료했습니다.

---

PR created automatically by Jules for task 9022279950578571025 started by @seonghobae

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.

[seonghobae]

Closing as superseded by #115, which already merged the unhandled model-state exception fix.

I checked #123 against current master after #108/#111/#113/#115/#117/#118/#119 merged. Its two-dot diff would reintroduce older workflow files and older validation code, remove newer formula docs/tests, and replace the scoped exists(..., inherits = FALSE) + isTRUE(...) guards with the older variant. Restacking this PR would therefore be a regression rather than an additive fix.

[google-labs-jules]

Closing as superseded by #115, which already merged the unhandled model-state exception fix.

I checked #123 against current master after #108/#111/#113/#115/#117/#118/#119 merged. Its two-dot diff would reintroduce older workflow files and older validation code, remove newer formula docs/tests, and replace the scoped exists(..., inherits = FALSE) + isTRUE(...) guards with the older variant. Restacking this PR would therefore be a regression rather than an additive fix.

알겠습니다. 이 PR의 내용이 이미 병합된 다른 PR에 의해 대체되었음을 확인하였으며, 더 이상의 작업을 중단하겠습니다.