optimize: 라운지 N+1 연관관계 해결 (left join fetch) (#37)

SouP/src/main/java/Matching/SouP/repository/LoungeRepository.java

@@ -8,6 +8,6 @@
 
 public interface LoungeRepository extends JpaRepository<Lounge,Long> {
 
-    @Query(value = "select l from Lounge l left join fetch l.user")
+    @Query(value = "select l from Lounge l left join fetch l.user order by l.id desc")
     List<Lounge> findAllDesc();
 }