- 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>

build.gradle

@@ -2,7 +2,7 @@ plugins {
     id 'java-library'
 }
 
-group   = 'com.eactive.apim.custom.djb'
+group   = 'com.eactive.ext.djb'
 version = '1.0.0'
 
 java {
@@ -45,6 +45,6 @@ tasks.register('runFakeSmoke', JavaExec) {
     group = 'verification'
     description = 'Run DamoManager main() with no scpdb on classpath (fake mode smoke test)'
     classpath = sourceSets.main.runtimeClasspath
-    mainClass = 'com.eactive.apim.custom.djb.damomanager.DamoManager'
+    mainClass = 'com.eactive.ext.djb.DamoManager'
     dependsOn 'classes'
 }