Refactor: change feed list count limit

Author: SolfE

src/main/java/com/linglevel/api/content/feed/repository/FeedRepositoryImpl.java

@@ -23,7 +23,7 @@ public class FeedRepositoryImpl implements FeedRepositoryCustom {
     private final MongoTemplate mongoTemplate;
     private final FeedRecommendationService feedRecommendationService;
 
-    private static final int RECOMMENDED_FETCH_LIMIT = 100;
+    private static final int RECOMMENDED_FETCH_LIMIT = 40;
 
     @Override
     public List<Feed> findByDeletedFalseWithProjection() {
@@ -68,15 +68,15 @@ private Page<Feed> findRegularFeeds(GetFeedsRequest request, Pageable pageable)
     }
 
     /**
-     * RECOMMENDED: 최근 100개만 로드 후 메모리에서 스코어링
+     * RECOMMENDED: 최근 50개만 로드 후 메모리에서 스코어링
      */
     private Page<Feed> findRecommendedFeeds(GetFeedsRequest request, String userId, Pageable pageable) {
         Query query = buildBaseQuery(request);
 
         // 필드 프로젝션
         applyFieldProjection(query);
 
-        // 최근 100개만 로드 (publishedAt 내림차순)
+        // 최근 50개만 로드 (publishedAt 내림차순)
         query.with(Sort.by(Sort.Direction.DESC, "publishedAt"))
                 .limit(RECOMMENDED_FETCH_LIMIT);
 

src/main/java/com/linglevel/api/content/feed/service/FeedService.java

@@ -25,9 +25,14 @@ public class FeedService {
     private final FeedRepository feedRepository;
     private final FeedRecommendationService feedRecommendationService;
 
+    private static final int MAX_PAGE_SIZE = 40;
+
     public PageResponse<FeedResponse> getFeeds(GetFeedsRequest request, String userId) {
+        // 내부적으로 최대 페이지 크기를 50개로 제한
+        int effectiveLimit = Math.min(request.getLimit(), MAX_PAGE_SIZE);
+
         // Pageable 생성 (0-based indexing)
-        Pageable pageable = PageRequest.of(request.getPage() - 1, request.getLimit());
+        Pageable pageable = PageRequest.of(request.getPage() - 1, effectiveLimit);
 
         // DB 레벨 필터링/정렬/페이징 처리
         Page<Feed> feedPage = feedRepository.findFeedsWithFilters(request, userId, pageable);