优化错误处理相关代码

internal/rpc/rpc_client.go

@@ -5,6 +5,7 @@ import (
 	"crypto/tls"
 	"encoding/base64"
 	"errors"
+	"fmt"
 	"github.com/TeaOSLab/EdgeCommon/pkg/rpc/pb"
 	"github.com/TeaOSLab/EdgeNode/internal/configs"
 	teaconst "github.com/TeaOSLab/EdgeNode/internal/const"
@@ -231,7 +232,7 @@ func (this *RPCClient) init() error {
 	for _, endpoint := range this.apiConfig.RPC.Endpoints {
 		u, err := url.Parse(endpoint)
 		if err != nil {
-			return errors.New("parse endpoint failed: " + err.Error())
+			return fmt.Errorf("parse endpoint failed: %w", err)
 		}
 		var conn *grpc.ClientConn
 		var callOptions = grpc.WithDefaultCallOptions(