chore: 코드리뷰 사항 반영

- 응답 객체에 swagger 스키마 적용
- 개행 추

Author: 7zrv

src/main/java/com/somemore/center/dto/response/PreferItemCreateResponseDto.java

@@ -3,15 +3,19 @@
 import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.fasterxml.jackson.databind.annotation.JsonNaming;
 import com.somemore.center.domain.PreferItem;
+import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Builder;
 
 import java.util.UUID;
 
 @JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy.class)
 @Builder
 public record PreferItemCreateResponseDto(
+        @Schema(description = "선호물품의 ID", example = "111")
         Long id,
+        @Schema(description = "기관의 ID", example = "123e4567-e89b-12d3-a456-426614174000")
         UUID centerId,
+        @Schema(description = "선호물품 이름", example = "어린이 도서")
         String itemName
 ) {
     public static PreferItemCreateResponseDto from(PreferItem preferItem) {

src/test/java/com/somemore/center/controller/PreferItemCommandApiControllerTest.java

@@ -80,4 +80,4 @@ void registerPreferItem_Fail_WhenCenterNotExists() throws Exception {
         // verify
         verify(createPreferItemUseCase).createPreferItem(userId, requestDto);
     }
-}
+}