- 패키지 com.eactive.ext.djb 로 변경

- DamoManager 위치/패키지 선언 이전
- build.gradle group, mainClass 동기화
- README 내 FQCN/경로 일괄 갱신

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

src/main/java/com/eactive/ext/djb/DamoManager.java

@@ -1,4 +1,4 @@
-package com.eactive.apim.custom.djb.damomanager;
+package com.eactive.ext.djb;
 
 import java.io.ByteArrayOutputStream;
 import java.io.UnsupportedEncodingException;