chore: 회고 생성일 최근이 먼저 보이도록 설정 (#451)

Author: mikekks

layer-api/src/main/java/org/layer/domain/retrospect/service/RetrospectService.java

@@ -129,7 +129,7 @@ public RetrospectListGetResponse getRetrospects(Long spaceId, Long memberId) {
 		Team team = new Team(memberSpaceRelationRepository.findAllBySpaceId(spaceId));
 		team.validateTeamMembership(memberId);
 
-		List<Retrospect> retrospects = retrospectRepository.findAllBySpaceId(spaceId);
+		List<Retrospect> retrospects = retrospectRepository.findAllBySpaceIdOrderByCreatedAtDesc(spaceId);
 		List<Long> retrospectIds = retrospects.stream().map(Retrospect::getId).toList();
 		Answers answers = new Answers(answerRepository.findAllByRetrospectIdIn(retrospectIds));
 

layer-domain/src/main/java/org/layer/domain/retrospect/repository/RetrospectRepository.java

@@ -19,6 +19,7 @@
 
 public interface RetrospectRepository extends JpaRepository<Retrospect, Long> {
     List<Retrospect> findAllBySpaceId(Long spaceId);
+	List<Retrospect> findAllBySpaceIdOrderByCreatedAtDesc(Long spaceId);
 
 	List<Retrospect> findAllBySpaceIdIn(List<Long> spaceIds);