feat(course): 거래소별 가격 비교 API 추가 (#111)

[ohhalim]

Summary

• GET /api/v1/courses/source-comparison?limit=10 엔드포인트 추가
• 동아골프·동부회원권 두 소스 모두 최신가가 있는 종목을 조회
• 가격 차이(diffAmount, diffRate) 절댓값 내림차순 정렬
• limit 파라미터로 반환 개수 제어 (최대 50)

Response 예시

[
  {
    "courseId": 1,
    "name": "가평베네스트",
    "region": "경기",
    "courseType": "GOLF",
    "dongaPrice": 85000000,
    "dongbuPrice": 87000000,
    "diffAmount": 2000000,
    "diffRate": 2.35
  }
]

Test plan

• 두 소스 모두 가격이 있는 종목이 반환되는지 확인
• diffRate 절댓값 내림차순 정렬 확인
• limit 파라미터 동작 확인

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: c7ac7125-d6e8-4905-b198-62327d291402

📥 Commits

Reviewing files that changed from the base of the PR and between 751120a and 948edd9.

📒 Files selected for processing (5)

• src/main/java/com/membershipflow/course/controller/CourseController.java
• src/main/java/com/membershipflow/course/dto/SourceComparisonItem.java
• src/main/java/com/membershipflow/course/service/CourseService.java
• src/main/java/com/membershipflow/price/repository/PriceHistoryRepository.java
• src/main/java/com/membershipflow/price/service/PriceService.java

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/111/source-comparison-api

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