refactor: 重构项目结构并优化类型定义

- 移除extension模块，将功能迁移至node-agent
- 修复类型导出问题，使用export type明确类型导出
- 统一数据库连接方式，从直接导入改为使用config/database
- 更新文档中的项目结构描述
- 添加多个服务的实用方法，如getForecast、getBalances等
- 修复类型错误和TS1205警告
- 优化RedisService调用方式
- 添加新的实体类型定义
- 更新审计日志格式，统一字段命名

package.json

@@ -4,7 +4,6 @@
   "description": "Crawlful: 全球电商增长中台",
   "workspaces": [
     "server",
-    "extension",
     "dashboard",
     "node-agent"
   ],
@@ -12,13 +11,11 @@
     "setup": "npm install",
     "server:dev": "cd server && npm run dev",
     "server:start": "cd server && npm run start",
-    "extension:dev": "cd extension && npm run dev",
-    "extension:build": "cd extension && npm run build",
     "dashboard:dev": "cd dashboard && npm run dev",
     "dashboard:build": "cd dashboard && npm run build",
     "node-agent:dev": "cd node-agent && npm run dev",
     "dev": "npm run server:dev",
-    "build": "npm run extension:build && npm run dashboard:build"
+    "build": "npm run dashboard:build"
   },
   "keywords": [],
   "author": "",