chore: fork from IRIS track 供 LICA 部门独立运行

- 复制来源: /home/yueli/track @ 192c8ee (feature/ai-audit-update)
- 组织隔离目标: LICA
- 端口规划: 前端 8030 / 后端 8031 / 数据库 8032
- 已排除 deploy.sh、deploy_full.sh、docker-compose.prod.yml（IRIS 生产发布脚本）
- 已排除工作区未提交改动，取干净的 192c8ee 状态

backend/app/schemas/notification.py

@@ -0,0 +1,27 @@
+"""通知 Pydantic Schema"""
+from __future__ import annotations
+import uuid
+from datetime import datetime
+from pydantic import BaseModel, Field
+
+
+class NotificationResponse(BaseModel):
+    """通知列表响应"""
+    id: uuid.UUID
+    user_id: str
+    title: str
+    content: str
+    type: str
+    task_id: uuid.UUID | None = None
+    product_serial_number: str | None = None
+    is_read: bool
+    created_at: datetime
+
+    model_config = {"from_attributes": True}
+
+
+class NotificationListResponse(BaseModel):
+    """通知分页列表"""
+    notifications: list[NotificationResponse]
+    total: int
+    unread_count: int