fix: 修复后端代码违规并更新协议文档

- 修复 notifications 模块 datetime.now() 缺少时区问题
- 用 ApiProblemError 替换 BaseService 中的 HTTPException
- 更新协议文档：添加错误码、繁体字段、邀请相关协议
- 升级 Docker 镜像版本

docs/protocols/notification/notification-inbox-protocol.md

@@ -82,15 +82,15 @@ Field rules:
 - `count`: integer `>= 0`
 - Counts only notifications where `notifications.status = 'published'` and `notifications.deleted_at IS NULL`
 
-### PATCH /api/v1/notifications/{id}/read
+### PATCH /api/v1/notifications/{notification_id}/read
 
 Mark a single notification as read. Idempotent.
 
-**Authorization**: Requires authenticated session. `id` must belong to the current user's `user_notifications`.
+**Authorization**: Requires authenticated session. `notification_id` must belong to the current user's `user_notifications`.
 
 **Path parameters**:
 
-- `id`: UUID of the `user_notifications` record
+- `notification_id`: UUID of the `user_notifications` record
 
 **Response (200)**: