ci:Jenkinsfile Slack 알림 추가 (slackSend #product_infra)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Jenkinsfile

@@ -30,7 +30,13 @@ pipeline {
     }
 
     post {
-        success { echo '✅ sales 배포 완료 (' + env.BRANCH_NAME + ')' }
+        success {
-        failure { echo '❌ sales 배포 실패 (' + env.BRANCH_NAME + ')' }
+            slackSend channel: '#product_infra', color: 'good',
+                message: "✅ *sales* 배포 성공 (`${env.BRANCH_NAME}`)\n<${env.BUILD_URL}|빌드 #${env.BUILD_NUMBER}>"
+        }
+        failure {
+            slackSend channel: '#product_infra', color: 'danger',
+                message: "❌ *sales* 배포 실패 (`${env.BRANCH_NAME}`)\n<${env.BUILD_URL}|빌드 #${env.BUILD_NUMBER}>"
+        }
     }
 }