refact : 보물 캡슐 개봉 응답 흐름 수정

backend/core/src/main/java/site/timecapsulearchive/core/domain/capsule/treasure_capsule/data/dto/TreasureCapsuleOpenDto.java

@@ -1,7 +1,14 @@
 package site.timecapsulearchive.core.domain.capsule.treasure_capsule.data.dto;
 
+import java.util.function.Function;
+import site.timecapsulearchive.core.domain.capsule.treasure_capsule.data.response.TreasureCapsuleOpenResponse;
+
 public record TreasureCapsuleOpenDto(
     String treasureImageUrl
 ) {
 
+    public TreasureCapsuleOpenResponse toResponse(final Function<String, String> s3PreSignedUrlForGet) {
+        String imageUrl = s3PreSignedUrlForGet.apply(treasureImageUrl);
+        return new TreasureCapsuleOpenResponse(imageUrl);
+    }
 }

backend/core/src/main/java/site/timecapsulearchive/core/domain/capsule/treasure_capsule/data/response/TreasureCapsuleOpenResponse.java

@@ -14,9 +14,7 @@ public static TreasureCapsuleOpenResponse createOf(
         final TreasureCapsuleOpenDto dto,
         final Function<String, String> s3PreSignedUrlForGet
     ) {
-        final String treasureImageUrl = s3PreSignedUrlForGet.apply(dto.treasureImageUrl());
-
-        return new TreasureCapsuleOpenResponse(treasureImageUrl);
+        return dto.toResponse(s3PreSignedUrlForGet);
     }
 
 }