ErrorWithStatus 추가

server.go

@@ -49,6 +49,14 @@ const (
 	ShutdownFlagIdle        = ShutdownFlag(3)
 )
 
+type ErrorWithStatus struct {
+	StatusCode int
+}
+
+func (e ErrorWithStatus) Error() string {
+	return fmt.Sprintf("%d", e.StatusCode)
+}
+
 type RpcReturnTypeInterface interface {
 	Value() any
 	Error() error