新增定时任务封装以及配置自动清理数据库功能

新增
- server/config/timer.go
- server/initialize/timer.go
- server/utils/db_automation.go
- server/utils/timer/timed_task.go
修改
- server/config.yaml
- server/config/config/go
- server/global/global.go
- server/main.go

server/config/config.go

@@ -18,4 +18,5 @@ type Server struct {
 	AliyunOSS  AliyunOSS  `mapstructure:"aliyun-oss" json:"aliyunOSS" yaml:"aliyun-oss"`
 	TencentCOS TencentCOS `mapstructure:"tencent-cos" json:"tencentCOS" yaml:"tencent-cos"`
 	Excel      Excel      `mapstructure:"excel" json:"excel" yaml:"excel"`
+	Timer      Timer      `mapstructure:"timer" json:"timer" yaml:"timer"`
 }