Merge pull request #79 from Decodeat/feat/77-behavior-based-recommendation

fix:추천 응답 null 제외

Author: kjhh2605

src/main/java/com/DecodEat/domain/products/service/ProductService.java

@@ -202,6 +202,7 @@ public List<ProductSearchResponseDto.ProductPrevDto> getProductBasedRecommendati
         }
 
         List<Product> productList = response.getRecommendations().stream()
+                .filter(r -> r.getProductId() != null)
                 .map(r -> productRepository.findById(r.getProductId())
                         .orElseThrow(() -> new GeneralException(PRODUCT_NOT_EXISTED)))
                 .toList();