refactor: [DDING-000] 변수명 명확화 및 CLAUDE.md 변수명 지침 추가

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: KoSeonJe

CLAUDE.md

@@ -17,6 +17,7 @@
 - 완전히 실행 가능한 코드만 제공한다 (의사코드 금지)
 - `@Valid`, `@NotNull` 등 DTO 검증 어노테이션 적용
 - secrets/환경변수 하드코딩 절대 금지
+- **변수명은 의미를 알 수 있도록 작성한다** — `dto`, `r`, `p` 같은 축약 금지, 역할이 드러나는 이름 사용 (예: `dto` → `rawRanking`, `r` → `ranking`)
 
 ### 새 기능 추가 시 필수 순서
 1. (DB 변경 시) `resources/db/migration/`에 Flyway 마이그레이션 파일 추가

src/main/java/ddingdong/ddingdongBE/domain/feed/service/GeneralFeedRankingService.java

@@ -82,20 +82,20 @@ private int getLastMonthRank(Long clubId, int year, int month) {
                 .orElse(0);
     }
 
-    private ClubFeedRankingQuery toClubFeedRankingQuery(int rank, MonthlyFeedRankingDto dto) {
-        long feedScore = dto.getFeedCount() * FEED_WEIGHT;
-        long viewScore = dto.getViewCount() * VIEW_WEIGHT;
-        long likeScore = dto.getLikeCount() * LIKE_WEIGHT;
-        long commentScore = dto.getCommentCount() * COMMENT_WEIGHT;
+    private ClubFeedRankingQuery toClubFeedRankingQuery(int rank, MonthlyFeedRankingDto rawRanking) {
+        long feedScore = rawRanking.getFeedCount() * FEED_WEIGHT;
+        long viewScore = rawRanking.getViewCount() * VIEW_WEIGHT;
+        long likeScore = rawRanking.getLikeCount() * LIKE_WEIGHT;
+        long commentScore = rawRanking.getCommentCount() * COMMENT_WEIGHT;
         long totalScore = feedScore + viewScore + likeScore + commentScore;
-        return ClubFeedRankingQuery.of(rank, dto.getClubId(), dto.getClubName(),
+        return ClubFeedRankingQuery.of(rank, rawRanking.getClubId(), rawRanking.getClubName(),
                 feedScore, viewScore, likeScore, commentScore, totalScore);
     }
 
-    private long calculateScore(MonthlyFeedRankingDto dto) {
-        return dto.getFeedCount() * FEED_WEIGHT
-                + dto.getViewCount() * VIEW_WEIGHT
-                + dto.getLikeCount() * LIKE_WEIGHT
-                + dto.getCommentCount() * COMMENT_WEIGHT;
+    private long calculateScore(MonthlyFeedRankingDto rawRanking) {
+        return rawRanking.getFeedCount() * FEED_WEIGHT
+                + rawRanking.getViewCount() * VIEW_WEIGHT
+                + rawRanking.getLikeCount() * LIKE_WEIGHT
+                + rawRanking.getCommentCount() * COMMENT_WEIGHT;
     }
 }