feat(server): online session history with configurable stats window (#1243)

Add persisted online sessions, configurable retention and online history statistics with lifecycle, recovery, timezone and concurrency regression coverage.

Co-authored-by: naiba/CloudCode <hi+cloudcode@nai.ba>

service/singleton/singleton.go

@@ -63,6 +63,7 @@ func LoadSingleton(bus chan<- *model.Service) (err error) {
 	ServerShared = NewServerClass()
 	CronShared = NewCronClass()
 	ServerTransferShared = NewServerTransferClass()
+	OnlineHistoryShared = NewOnlineHistoryRecorder()
 	// 最后初始化 ServiceSentinel
 	ServiceSentinelShared, err = NewServiceSentinel(bus)
 	return
@@ -94,7 +95,7 @@ func InitDBFromPath(path string) error {
 		model.Cron{}, model.Transfer{}, model.ServerGroupServer{},
 		model.NAT{}, model.DDNSProfile{}, model.NotificationGroupNotification{},
 		model.WAF{}, model.Oauth2Bind{}, model.ServerTransfer{}, model.JWTSession{},
-		model.APIToken{}, model.MCPAuditLog{})
+		model.APIToken{}, model.MCPAuditLog{}, model.OnlineSession{})
 	if err != nil {
 		return err
 	}