在非web环境下自定义了limitApp来源，怎么设置origin的值？

使用 `@SentinelResource` 注解进行限流、熔断，同时规则里面设置了 `limitApp` 属性，怎么能更改 `origin` 的值，在com.alibaba.csp.sentinel.CtSph#entryWithPriority(com.alibaba.csp.sentinel.slotchain.ResourceWrapper, int, boolean, java.lang.Object...)方法里面通过InternalContextUtil.internalEnter(Constants.CONTEXT_DEFAULT_NAME)设置Context对象的属性，但是 `origin` 的值为空字符串，限流的逻辑在com.alibaba.csp.sentinel.slots.block.flow.FlowRuleChecker#selectNodeByRequesterAndStrategy方法里面比较 `limitApp` 和 `origin` 的值，两者不一致，导致限流失败。

Start with CtSph#entryWithPriority and InternalContextUtil.internalEnter to trace how the Context is created in a non-web environment. Then inspect FlowRuleChecker#selectNodeByRequesterAndStrategy and the comparison between limitApp and origin; done means callers have a documented, working way to set origin so the configured limitApp is matched.

Written by the indexing model from the issue text.