Ensure Internal entity exceptions are correctly handled

还没有人认领这个 Issue。

As discussed here: https://github.com/Azure/azure-functions-durable-python/pull/184

There's an outstanding discussion about what to do when an entity errors out due to an internal exception. For example: what if an operation is missing its name.

One possibility is to propagate the error back to the orchestrator, same as if it were a user-code-level exception. Another approach is to error out completely and let the extension handle it, which is our current approach.

首先阅读 pull request 184 中的讨论，以及 issue 对缺失操作名称的描述。确定内部实体异常应传播到编排器，还是应终止以便由扩展处理，然后定义预期行为，并通过针对该路径的专门覆盖进行验证。

由索引模型根据 Issue 内容生成。