refactor(api): 重构API路由及模块结构，清理废弃模型代码

- 修改alembic配置以使用异步数据库URI和更新Base类引用
- 新增数据库Schema优化脚本，统一字段长度，添加索引，规范外键策略
- 重构API路由管理，按模块类型分组并统一前缀
- 删除示例、监控及系统各子模块的模型定义，减少冗余代码
- 将mcp_server相关代码迁移到module_ai模块下，规范模块目录结构
- 迁移example控制器至module_application.application模块，并重命名相关服务和参数名
- 优化示例控制器中的依赖和响应结构，统一命名规范

backend/app/scripts/data/system_users.json

@@ -1,12 +1,12 @@
 [
   {
     "id": 1,
-    "username": "admin",
-    "password": "$2b$12$e2IJgS/cvHgJ0H3G7Xa08OXoXnk6N/NX3IZRtubBDElA0VLZhkNOa",
-    "name": "管理员",
-    "mobile": "15382112222",
-    "email": "admin@qq.com",
-    "gender": "0",
+    "username": "superadmin",
+    "password": "$2b$12$/Df5YczDGF41zCh2F8Xbu.yHTJXGm3tONgsXz1KLUdG0mtpKUOLD2",
+    "name": "超级管理员",
+    "mobile": "15382112620",
+    "email": "948080782@qq.com",
+    "gender": "1",
     "avatar": "https://service.fastapiadmin.com/api/v1/static/image/avatar.png",
     "status": true,
     "is_superuser": true,
@@ -17,6 +17,22 @@
   },
   {
     "id": 2,
+    "username": "admin",
+    "password": "$2b$12$e2IJgS/cvHgJ0H3G7Xa08OXoXnk6N/NX3IZRtubBDElA0VLZhkNOa",
+    "name": "管理员",
+    "mobile": "15382112222",
+    "email": "admin@qq.com",
+    "gender": "0",
+    "avatar": "https://service.fastapiadmin.com/api/v1/static/image/avatar.png",
+    "status": true,
+    "is_superuser": false,
+    "last_login": null,
+    "dept_id": 1,
+    "description": "管理员",
+    "creator_id": 1
+  },
+  {
+    "id": 3,
     "username": "demo",
     "password": "$2b$12$e2IJgS/cvHgJ0H3G7Xa08OXoXnk6N/NX3IZRtubBDElA0VLZhkNOa",
     "name": "演示用户",