[Fix]: 오류 해결 (#157)

* [Fix]: 오류 해결

* [Fix]: 오류 해결

Author: eunchan96

src/main/java/com/backend/domain/product/controller/ApiV1ProductController.java

@@ -195,7 +195,7 @@ public RsData<PageDto<ProductListByMemberItemDto>> getProductsByMemberAndElastic
             @RequestParam(defaultValue = "SELLING") SaleStatus status,
             @RequestParam(defaultValue = "LATEST") ProductSearchSortType sort
     ) {
-        Member actor = memberService.findById(memberId).orElseThrow(() -> new ServiceException("404", "존재하지 않는 회원입니다"));
+        Member actor = memberService.findById(memberId).orElseThrow(ProductException::memberNotFound);
 
         Page<ProductDocument> products = productSearchService.searchProductsByMember(page, size, sort, actor, status);