feat: add models and enum

itd/models/notification.py

@@ -0,0 +1,22 @@
+from uuid import UUID
+from datetime import datetime
+
+from pydantic import BaseModel, Field
+
+from itd.enums import NotificationType, NotificationTargetType
+from itd.models.user import UserNotification
+
+class Notification(BaseModel):
+    id: UUID
+    type: NotificationType
+
+    target_type: NotificationTargetType | None = Field(None, alias='targetType') # none - follows, other - NotificationTragetType.POST
+    target_id: int | None = Field(None, alias='targetId') # none - follows
+
+    preview: str | None = None # follow - none, comment/reply - content, repost - original post content, like - post content, wall_post - wall post content
+
+    read: bool = False
+    read_at: datetime | None = Field(None, alias='readAt')
+    created_at: datetime = Field(alias='createdAt')
+
+    actor: UserNotification