내외부 시퀀스 - 불필요 이벤트 제거

design/backend/sequence/inner/notification-알림발송.puml

@@ -12,14 +12,17 @@ participant "Email Service<<E>>" as Email
 participant "NotificationRepository" as Repository
 database "PostgreSQL<<E>>" as DB
 
-EventHub -> Listener: consume(NotificationEvent)
+EventHub -> Listener: consume(NotificationRequest)
 activate Listener
 note right
-  Event 종류:
-  - MeetingCreatedEvent
-  - TodoAssignedEvent
-  - MeetingReminderEvent
-  - SummaryCompletedEvent
+  NotificationRequest 이벤트:
+  - channel: 발송수단 (EMAIL, SMS)
+  - recipients: 대상자 목록
+  - message: 메시지 내용
+  - metadata: 추가 정보 (회의정보 등)
+
+  Consumer Group:
+  - notification-service-group
 end note
 
 Listener -> Service: processNotification(event)