feat(template): define MongoDB schema for message templates and email senders

apps/notification/backend/models/models.py

@@ -0,0 +1,26 @@
+from beanie import Document
+from datetime import datetime
+from typing import Optional
+
+from common.constants.region import UserRegion
+
+class MessageTemplateDoc(Document):
+    template_id: str
+    tenant_id: Optional[str] = None
+    region: UserRegion
+    subject: str
+    body: str
+    is_active: bool = True
+    created_at: datetime = datetime.utcnow()
+    updated_at: Optional[datetime] = None
+
+    class Settings:
+        name = "message_templates_doc"
+
+class EmailSenderDoc(Document):
+    tenant_id: str
+    email_senders: list[str] = []
+    is_active: bool = True
+
+    class Settings:
+        name = "email_sender_doc"