feat(manga): add malId to manga details DTO

src/main/java/com/magamochi/mangamochi/model/dto/MangaDTO.java

@@ -14,6 +14,7 @@ import java.util.List;
 
 public record MangaDTO(
     @NotNull Long id,
+    @NotNull Long malId,
     @NotBlank String title,
     String coverImageKey,
     String status,
@@ -32,6 +33,7 @@ public record MangaDTO(
   public static MangaDTO from(Manga manga, Boolean favorite, Boolean following) {
     return new MangaDTO(
         manga.getId(),
+        manga.getMalId(),
         manga.getTitle(),
         isNull(manga.getCoverImage()) ? null : manga.getCoverImage().getFileKey(),
         manga.getStatus(),