fix: 어드민에서 알림 모델들 관련한 목록의 제목이 이상한 문제 수정

Author: MU-Software

app/notification/models/base.py

@@ -76,6 +76,9 @@ class Meta:
             ),
         ]
 
+    def __str__(self) -> str:
+        return f"[{self.code}] {self.title}"
+
     @classmethod
     def _to_dtl(cls, source: str) -> str:
         return source
@@ -153,6 +156,9 @@ class NotificationHistoryBase(BaseAbstractModel):
     class Meta:
         abstract = True
 
+    def __str__(self) -> str:
+        return f"{self.template_code or '-'} by {self.created_by}"
+
     @property
     def template_code(self) -> str:
         return self.template.code if self.template_id else ""
@@ -212,6 +218,9 @@ class Meta:
             ),
         ]
 
+    def __str__(self) -> str:
+        return f"{self.recipient} ({self.get_status_display()})"
+
     def _parsed_template_data(self) -> Any:
         try:
             return json_loads(self.history.template_data)