add: added field

smeem-application/src/main/java/com/smeem/application/domain/diary/Diary.java

@@ -17,10 +17,15 @@ public class Diary {
     private Long topicId;
     private long memberId;
     private LocalDateTime createdAt;
+    private LocalDateTime updatedAt;
 
     public void validateDiaryOwnership(long memberId) {
         if (this.memberId != memberId) {
             throw new SmeemException(ExceptionCode.INVALID_MEMBER_AND_DIARY);
         }
     }
+
+    public boolean isUpdated() {
+        return updatedAt.isAfter(createdAt);
+    }
 }

smeem-application/src/main/java/com/smeem/application/port/input/dto/response/diary/RetrieveDiaryResponse.java

@@ -25,6 +25,8 @@ public record RetrieveDiaryResponse(
         String createdAt,
         @Schema(description = "일기 작성자 닉네임")
         String username,
+        @Schema(description = "일기 수정 여부")
+        boolean isUpdated,
         @Schema(description = "코칭 결과 정보")
         List<CorrectionResponse> corrections,
         @Schema(description = "코칭 횟수")
@@ -45,6 +47,7 @@ public static RetrieveDiaryResponse of(
                         .content(diary.getContent())
                         .createdAt(SmeemConverter.toString(diary.getCreatedAt()))
                         .username(member.getUsername())
+                        .isUpdated(diary.isUpdated())
                         .corrections(corrections.stream().map(CorrectionResponse::from).toList())
                         .correctionCount(correctionCount)
                         .correctionMaxCount(1)

smeem-output-persistence/postgresql/src/main/java/com/smeem/persistence/postgresql/persistence/entity/DiaryEntity.java

@@ -37,6 +37,7 @@ public Diary toDomain() {
                 .topicId(topicId)
                 .memberId(memberId)
                 .createdAt(createdAt)
+                .updatedAt(updatedAt)
                 .build();
     }