[Feat] 산별 등산 기록 목록 API - 정상 인근 트래킹 사진 2장 응답 추가

[pooreumjung]

🧾 요약

• /api/hiking-records/me/mountains 응답의 이미지를 산 기본 이미지 대신, 트래킹 중 촬영한 사진 중 정상 좌표 기준 가장 가까운 2장으로 변경

🔗 이슈

• close [feat] 산별 등산 기록 목록 API - 정상 인근 트래킹 사진 2장 응답 추가 #165

✨ 변경 내용

• HikingRecordRepository SQL — LATERAL JOIN + ROW_NUMBER 피벗으로 tracking_photos → tracking_sessions 경유, ST_Distance 기준 정상 인근 사진 2장 조회
• UserHikingMountainRecordProjection — getImageUrl() → getImageUrl1(), getImageUrl2()로 분리
• GetUserHikingMountainRecordResponse — imageUrl: String → imageUrls: List<String> (null/blank 필터링)
• GetUserHikingMountainRecordResponseTest — 정상 매핑, blank 필터링, 사진 없는 케이스 검증 추가

✅ 확인

• 빌드 OK
• 테스트 OK

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[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

이번 변경은 사용자의 등산 기록 목록 조회 시 제공되는 시각적 정보를 개선하기 위한 것입니다. 기존의 산 기본 이미지 대신, 사용자가 실제 트래킹 중 정상 인근에서 촬영한 사진을 우선적으로 노출하여 사용자 경험을 향상시켰습니다. 이를 위해 데이터베이스 쿼리 구조를 조정하고 DTO 및 관련 테스트 코드를 업데이트하였습니다.

Highlights

• API 응답 데이터 변경: 산별 등산 기록 목록 API 응답에서 산 기본 이미지 대신, 정상 좌표와 가장 가까운 트래킹 사진 2장을 포함하도록 변경했습니다.
• 데이터베이스 쿼리 최적화: LATERAL JOIN과 ROW_NUMBER를 사용하여 정상 위치 기준 가장 가까운 사진을 효율적으로 조회하도록 쿼리를 개선했습니다.
• DTO 및 프로젝션 수정: 이미지 URL 필드를 단일 문자열에서 리스트 형태로 변경하고, null 또는 빈 값을 필터링하는 로직을 추가했습니다.

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[gemini-code-assist]

Code Review

This pull request updates the user's hiking mountain record response to return up to two tracking photos instead of a single mountain image. The repository query was updated to fetch the two closest tracking photos using a lateral join and spatial distance sorting. The review feedback recommends optimizing the query's performance by casting the spatial coordinates to geometry instead of geography in the ST_Distance function, which reduces computational overhead while maintaining sufficient accuracy for sorting.