Q&A 댓글 엔터티 헬퍼 및 알림 코드 추가

- InquiryComment 헬퍼 메서드 - 삭제/관리자 판정
- MessageCode - INQUIRY_COMMENT_CREATED_ADMIN 추가

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/main/java/com/eactive/apim/portal/qna/entity/InquiryComment.java

@@ -35,4 +35,16 @@ public class InquiryComment extends Auditable implements Serializable {
 
     @Column(name = "ADMIN_YN", length = 1)
     private String adminYn = "N";
+
+    public void markDeleted() {
+        this.delYn = "Y";
+    }
+
+    public boolean isDeleted() {
+        return "Y".equals(this.delYn);
+    }
+
+    public boolean isAdmin() {
+        return "Y".equals(this.adminYn);
+    }
 }

src/main/java/com/eactive/apim/portal/template/entity/MessageCode.java

@@ -30,6 +30,9 @@ public enum MessageCode {
     APP_REGISTER_APPROVED("앱 등록 승인", "FM_APIM009", Channels.EMAIL),
     APP_REGISTER_REJECTED("앱 등록 거절", "FM_APIM010", Channels.EMAIL),
 
+    // Q&A 댓글 등록 (DJBank 커스텀)
+    INQUIRY_COMMENT_CREATED_ADMIN("Q&A 댓글 등록 알림", null, Channels.NONE),
+    
     
     // API상태 모니터링
     API_STATUS_CHANGED("API 상태 변화", "FM_APIM011", Channels.MESSENGER),