Saga模式下流转过程中输出参数传递至输入参数

## Why you need it?
最近使用Saga模式实现，文档中提到也Output中可将服务返回的参数赋值到状态机上下文中。
但在其他节点中希望使用Input将该参数值传入时，总是无法成功。

## How it could be?
A clear and concise description of what you want to happen. You can explain more about input of the feature, and output of it.
希望可以实现参数传递的配置，或者给出目前的方法？

## Other related information
Add any other context or screenshots about the feature request here.