正向流程同步，补偿流程异步化

## 为什么我需要它
问题描述：
使用stateMachineEngine.start同步执行，saga的事物流程抛出异常时，希望能立即返回错误，同步补偿的流程能够异步化。
原因：
补偿流程异步化可以降低接口的RT。

## 如何做
在CompensationTrigger上做一个配置项目，async=true。能够让补偿流程直接走异步。

Start by tracing stateMachineEngine.start and CompensationTrigger to understand where synchronous compensation is invoked. Determine how an async=true configuration would affect error return behavior and compensation execution, then add focused coverage for both configured modes; done means failures return immediately while compensation continues asynchronously when enabled.

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