Refactor/#62 payment

[shinae1023]

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• MockQuestionCache의 questions가 ElementCollection 프록시 상태로 응답 직렬화 단계까지 전달되면서 LazyInitializationException이 발생하던 문제를 수정했습니다. 캐시 조회 및 저장 직후 questions를 List.copyOf로 복사해 서비스 계층에서 일반 리스트로 반환하도록 변경해 세션 종료 이후에도 안전하게 JSON 직렬화되도록 보완했습니다.

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🚨 관련 이슈 번호 [#38]

Summary by CodeRabbit

• Refactor
  • Improved consistency in how question lists are returned from cache and generation paths to ensure data integrity across operations.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 12a1cff0-6c0e-4df6-b1a7-8e523caada3d

📥 Commits

Reviewing files that changed from the base of the PR and between 8824f60 and 86b4979.

📒 Files selected for processing (1)

• src/main/java/com/jobdri/jobdri_api/domain/jobposting/service/MockQuestionCacheService.java

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📝 Walkthrough

Walkthrough

MockQuestionCacheService adds a private copyQuestions(MockQuestionCache) helper that returns List.copyOf(cache.getQuestions()). Both the cached lookup path in getRecommendedQuestions and the freshly-generated path in createAndCacheQuestions are updated to return the result through this helper instead of the raw list.

Changes

Immutable Question List Copy

Layer / File(s)	Summary
copyQuestions helper and all call sites src/main/java/com/jobdri/jobdri_api/domain/jobposting/service/MockQuestionCacheService.java	Adds a private copyQuestions(MockQuestionCache) method returning List.copyOf(cache.getQuestions()). The cached-path mapping in getRecommendedQuestions and the saved-entity return in createAndCacheQuestions both switch from returning the raw list to calling this helper, aligning behavior across both code paths.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐇 A bunny once carried her questions about,
But the list would get changed—that filled her with doubt.
So she wrapped every answer in copyOf tight,
Immutable hops from the morning till night.
"No one shall mutate my cache!" she did say,
And bounded off joyfully into the day. 🌿

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The PR title 'Refactor/#62 payment' is unrelated to the actual changes, which involve fixing a LazyInitializationException in MockQuestionCache by implementing List.copyOf for safe JSON serialization.	Update the title to reflect the actual change, such as 'Fix LazyInitializationException in MockQuestionCache by copying questions list' or 'Refactor MockQuestionCache to use List.copyOf for safe serialization'.
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description check	✅ Passed	The PR description covers the key technical details and requirements, properly explaining the LazyInitializationException issue and the List.copyOf solution, though some checkboxes remain unchecked.
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.

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✨ Finishing Touches

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🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch refactor/#62-payment

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