refactor: 랭킹 API 의 상품 응답 스펙에 재고에 따른 특정 결과만 포함하도록 수정

Author: yeonjiyeon

apps/commerce-api/src/main/java/com/loopers/application/rank/RankingInfo.java

@@ -6,7 +6,7 @@ public record RankingInfo(
     Long productId,
     String productName,
     Long price,
-    int stock,
+    boolean isSoldOut,
     int currentRank
 ) {
 
@@ -15,7 +15,7 @@ public static RankingInfo of(Product product, int currentRank) {
         product.getId(),
         product.getName(),
         product.getPrice().getValue(),
-        product.getStock(),
+        product.getStock() <= 0,
         currentRank
     );
   }

apps/commerce-api/src/main/java/com/loopers/interfaces/api/rank/RankingV1Dto.java

@@ -8,7 +8,7 @@ public record RankingResponse(
       Long productId,
       String productName,
       Long price,
-      int stock,
+      boolean isSoldOut,
       int currentRank
   ) {
 
@@ -17,7 +17,7 @@ public static RankingResponse from(RankingInfo info) {
           info.productId(),
           info.productName(),
           info.price(),
-          info.stock(),
+          info.isSoldOut(),
           info.currentRank()
           );
     }