Merge pull request #275 from CodIN-INU/refactor/post-feat

fix: post 단건/목록 JSON을 현재 프론트 요구사항에 맞게 정규화

Author: gisu1102

src/main/java/inu/codin/codin/domain/post/dto/response/PostPageItemResponseDTO.java

@@ -1,10 +1,14 @@
 package inu.codin.codin.domain.post.dto.response;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonUnwrapped;
 import lombok.Builder;
 import lombok.Getter;
 
 @Getter
+@JsonInclude(JsonInclude.Include.NON_NULL)
 public class PostPageItemResponseDTO {
+    @JsonUnwrapped // 추후 프론트에 얘기해서 {post:{}, poll:{} 구조로 변경} 현재:{,,,poll:{}}
     private final PostDetailResponseDTO post;
     private final PollInfoResponseDTO poll;