feat(yudao): 添加芋道兼容层和基础路由

- 新增 yudao_compat.py：芋道标准响应格式、权限校验
- 新增 yudao_auth.py：登录认证、权限信息、租户等系统接口
- 新增 yudao_alert.py：告警管理和摄像头汇总的芋道兼容路由
- 新增 routers/__init__.py：统一导出路由模块

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/routers/__init__.py

@@ -0,0 +1,17 @@
+"""
+路由模块
+
+芋道兼容的 API 路由
+"""
+
+from app.routers.yudao_auth import router as yudao_auth_router
+from app.routers.yudao_alert import router as yudao_alert_router
+from app.routers.yudao_aiot_alarm import router as yudao_aiot_alarm_router
+from app.routers.yudao_aiot_edge import router as yudao_aiot_edge_router
+
+__all__ = [
+    "yudao_auth_router",
+    "yudao_alert_router",
+    "yudao_aiot_alarm_router",
+    "yudao_aiot_edge_router",
+]