⚡ Bolt: Optimize maximum matrix rows calculation with vapply

[seonghobae]

💡 What: Replaced max(sapply(mispatts, nrow)) with max(vapply(mispatts, nrow, numeric(1))).
🎯 Why: vapply has significantly lower overhead compared to sapply since the return type is explicitly specified, resulting in faster and safer calculations.
📊 Impact: Microbenchmarks show a small but measurable decrease in computation time for evaluating missing patterns.
🔬 Measurement: The improvement can be observed by profiling the llcont method on a lavaan object containing missing values.

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PR created automatically by Jules for task 10202613825547525671 started by @seonghobae

Summary by CodeRabbit

• 개선 사항

  • 누락 데이터 패턴별 행 수 계산의 안정성과 성능을 개선했습니다.
  • 계산 결과의 반환 형식과 길이를 검증해 예기치 않은 결과를 조기에 확인할 수 있습니다.

• 문서

  • R 코드에서 보다 명확한 반환 형식 검증 방식을 사용하는 학습 항목을 추가했습니다.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 7d64cd90-b609-4852-907d-2959fb9e9439

📥 Commits

Reviewing files that changed from the base of the PR and between 807e940 and 1bc09f6.

📒 Files selected for processing (2)

• .jules/bolt.md
• R/llcont.R

Included review availability: Your plan includes up to 1 review per rolling hour; 0 remain after this review.

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📝 Walkthrough

Walkthrough

누락 패턴별 행 수 수집에 vapply를 사용하도록 변경했습니다. 반환 타입과 길이를 명시하는 사용 지침도 추가했습니다.

Changes

R 반복 처리 최적화

Layer / File(s)	Summary
반환 타입 지정 반복 처리 R/llcont.R, .jules/bolt.md	mispatts의 행 수 수집에 vapply(..., numeric(1))를 사용합니다. 알려진 반환 타입과 길이에는 vapply를 사용하도록 학습 항목을 추가했습니다.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Merge Risk: ⚪ Minimal · up to 1bc09

This PR makes a localized calculation more efficient without evidence of changed user-visible behavior or an actionable merge-blocking risk; it is merge-ready after normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	제목은 sapply를 vapply로 변경하여 최대 행 수 계산을 최적화하는 주요 변경 사항을 정확하고 간결하게 설명합니다.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bolt-vapply-optimization-10202613825547525671

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