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

watchdog/command.go

@@ -9,7 +9,7 @@ func AddInstance(serviceName string) bool {
 		return false
 	}
 
-	message := fmt.Sprintf("[addInstance] <serviceName>%s</serviceName>", serviceName)
+	message := fmt.Sprintf("[instance.add] <serviceName>%s</serviceName>", serviceName)
 	response, err := sendMsg(message, 3)
 	if err != nil {
 		return false
@@ -23,7 +23,7 @@ func RemoveInstance(serviceName string) bool {
 		return false
 	}
 
-	message := fmt.Sprintf("[removeInstance] <serviceName>%s</serviceName>", serviceName)
+	message := fmt.Sprintf("[instance.remove] <serviceName>%s</serviceName>", serviceName)
 	response, err := sendMsg(message, 3)
 	if err != nil {
 		return false
@@ -31,3 +31,17 @@ func RemoveInstance(serviceName string) bool {
 
 	return response == "success"
 }
+
+func Close() bool {
+	if !IsConnected() {
+		return false
+	}
+
+	message := "watchdog.shutdown"
+	response, err := sendMsg(message, 3)
+	if err != nil {
+		return false
+	}
+
+	return response == "success"
+}