MOSU-360 fix: 문의 답변 시 "관리자" 고정적으로 명시

Author: jbh010204

src/main/java/life/mosu/mosuserver/presentation/inquiry/dto/InquiryAnswerRequest.java

@@ -21,7 +21,7 @@ public InquiryAnswerJpaEntity toEntity(Long postId, UserJpaEntity user) {
                 .title(title)
                 .content(content)
                 .userId(user.getId())
-                .author(user.getName())
+                .author("관리자")
                 .build();
     }
 }

src/main/java/life/mosu/mosuserver/presentation/inquiry/dto/InquiryCreateRequest.java

@@ -27,7 +27,7 @@ public InquiryJpaEntity toEntity(UserJpaEntity user) {
                 .title(title)
                 .content(content)
                 .userId(user.getId())
-                .author("관리자")
+                .author(user.getName())
                 .build();
     }
 }