feat(watchdog): improve watchdog instance tracking

- Add Close() function to watchdog for graceful shutdown
- Update instance message format for better consistency
- Add watchdog status tracking in StatusInfo
- Include watchdog field in FrpcInstance struct and database
- Change port fields from string to int in FrpcProxyInfo
- Add auth_token support in InstanceInfo

main.go

@@ -31,7 +31,8 @@ var softwareInfo SoftwareInfo = SoftwareInfo{
 }
 
 type StatusInfo struct {
-	Status string
+	ServerStatus string
+	WatchdogStatus string
 }
 
 type Is struct {
@@ -84,7 +85,7 @@ func main() {
 	postLog.Info("Database initialized successfully")
 
 	if err := InitFrpcDatabase(*dbPath_data); err != nil {
-		postLog.Warning(fmt.Sprintf("Failed to initialize frpc database: %v", err))
+		postLog.Fatal(fmt.Sprintf("Failed to initialize frpc database: %v", err))
 	}
 
 	frpLogger.SetDatabase(db, frpcDB)
@@ -154,15 +155,25 @@ func main() {
 		postLog.Error(fmt.Sprintf("Error closing frpc database: %v", err))
 	}
 
+	watchdog.Close()
+
 	postLog.Info("Server stopped")
 }
 
 func GetStatusHandler(w http.ResponseWriter, r *http.Request) {
 	statusInfo := StatusInfo{
-		Status: "Online",
+		ServerStatus: "Offline",
+		WatchdogStatus: "Offline",
 	}
 	if !is.online {
-		statusInfo.Status = "Offline"
+		statusInfo.ServerStatus = "Offline"
+	} else {
+		statusInfo.ServerStatus = "Online"
+	}
+	if !is.watchdogConnected {
+		statusInfo.WatchdogStatus = "Offline"
+	} else {
+		statusInfo.WatchdogStatus = "Online"
 	}
 	SendSuccessResponse(w, "getStatus", statusInfo)
 }