feat: 제품 조회 쿼리에 브랜드 정보 로딩 최적화

Author: rnqhstmd

apps/commerce-api/src/main/java/com/loopers/infrastructure/product/ProductJpaRepository.java

@@ -2,6 +2,7 @@
 
 import com.loopers.domain.product.Product;
 import jakarta.persistence.LockModeType;
+import org.springframework.data.jpa.repository.EntityGraph;
 import org.springframework.data.jpa.repository.Lock;
 import org.springframework.data.repository.query.Param;
 import org.springframework.data.domain.Page;
@@ -18,8 +19,9 @@ public interface ProductJpaRepository extends JpaRepository<Product, Long> {
     @Query("SELECT p FROM Product p WHERE p.id IN :ids")
     List<Product> findAllByIds(@Param("ids") Collection<Long> ids);
 
-    @Query("SELECT p FROM Product p JOIN FETCH p.brand b " +
-            "WHERE (:brandId IS NULL OR b.id = :brandId)")
+    @EntityGraph(attributePaths = {"brand"})
+    @Query("SELECT p FROM Product p " +
+            "WHERE (:brandId IS NULL OR p.brand.id = :brandId)")
     Page<Product> findProducts(@Param("brandId") Long brandId, Pageable pageable);
 
     @Lock(LockModeType.PESSIMISTIC_WRITE)