feat: 添加数据库集成、定时任务调度器和事件Hook体系

- 新增数据库配置项(DB_TYPE, DB_HOST, DB_PORT等)，支持MySQL和PostgreSQL
- 集成GORM实现数据库连接和自动迁移功能
- 添加定时任务调度器(cmd/scheduler)，基于robfig/cron实现秒级调度
- 实现事件Hook体系，支持同步/异步处理和优先级排序
- 更新构建脚本，编译server、cli、scheduler三个二进制文件
- 配置systemd服务管理定时任务调度器
- 重构项目结构，新增crontab和hooks目录模块
- 更新README文档，完善各组件使用说明和部署配置

.gitea/workflows/build.yaml

@@ -16,6 +16,7 @@ jobs:
         run: |
           go build -ldflags="-s -w" -o server ./cmd/main_program
           go build -ldflags="-s -w" -o cli ./cmd/cli_control
+          go build -ldflags="-s -w" -o scheduler ./cmd/scheduler
 
       - name: Save artifact
         uses: actions/upload-artifact@v3
@@ -24,6 +25,7 @@ jobs:
           path: |
             ./server
             ./cli
+            ./scheduler
 
   deploy:
     needs: build
@@ -51,13 +53,10 @@ jobs:
           while read -r ip; do
             if [ -n "$ip" ]; then
               echo "Deploying to $ip..."
-              scp -o StrictHostKeyChecking=no server ${{ vars.ROOT_USER_NAME }}@"$ip":/root/server.tmp
-              scp -o StrictHostKeyChecking=no cli ${{ vars.ROOT_USER_NAME }}@"$ip":/root/cli.tmp
+              scp -o StrictHostKeyChecking=no server cli scheduler ${{ vars.ROOT_USER_NAME }}@"$ip":/root/
               ssh -n ${{ vars.ROOT_USER_NAME }}@"$ip" << 'ENDSSH'
-                mv /root/server.tmp /root/server
-                mv /root/cli.tmp /root/cli
-                chmod +x /root/server /root/cli
-                systemctl restart server cli
+                chmod +x /root/server /root/cli /root/scheduler
+                systemctl restart server cli scheduler
               ENDSSH
               echo "Deployment to $ip completed"
             fi