polaris.ConfigAPI 不能并行监听多个配置文件

[nxsre]

Describe the bug
使用 polaris.ConfigAPI 监听配置文件存在不能串行等待的问题，每个配置需要等待1s导致程序启动超时
To Reproduce

package main

import (
	"fmt"
	"github.com/polarismesh/polaris-go/pkg/config"
	"log"
	"time"

	"github.com/polarismesh/polaris-go"
	"github.com/polarismesh/polaris-go/pkg/model"
)

func main() {
	cfg := config.ConfigurationImpl{}
	cfg.Init()
	cfg.SetDefault()
	cfg.Global.ServerConnector.SetAddresses([]string{"10.211.55.16:8091"})
	cfg.Config.ConfigConnectorConfig.SetAddresses([]string{"10.211.55.16:8093"})
	configAPI, err := polaris.NewConfigAPIByConfig(&cfg)
	if err != nil {
		fmt.Println("fail to start example.", err)
		return
	}
	for _, f := range []string{"blacklist-44444.json", "blacklist-51934.json", "blacklist-64532.json"} {
		go watchfile(f, configAPI)
	}
	time.Sleep(10 * time.Second)
}

func watchfile(fileName string, configAPI polaris.ConfigAPI) {
	t1 := time.Now()

	//configAPI, err := polaris.NewConfigAPI()

	t2 := time.Now()
	// 获取远程的配置文件
	namespace := "default"
	fileGroup := "tcpwall"
	//fileName := "example.yaml"

	configFile, err := configAPI.GetConfigFile(namespace, fileGroup, fileName)
	if err != nil {
		log.Println("fail to get config.", err)
		return
	}
	t3 := time.Now()
	// 打印配置文件内容
	log.Println(configFile.GetContent())

	// 方式一：添加监听器
	configFile.AddChangeListener(changeListener)

	// 方式二：添加监听器
	//changeChan := configFile.AddChangeListenerWithChannel()
	t4 := time.Now()
	fmt.Println(t4.Sub(t3), t3.Sub(t2), t2.Sub(t1))
	//for {
	//	select {
	//	case event := <-changeChan:
	//		log.Printf("received change event by channel. %+v", event)
	//	}
	//}
}

func changeListener(event model.ConfigFileChangeEvent) {
	log.Printf("received change event. %+v", event)
}

Expected behavior
预期为 watchfile 可以同时监听多个配置文件

Environment
Linux / macOS 均可复现