Ryan Sweet

### What feature would you like to be added? add check in xlang ci to validate that the app shuts down properly ### Why is this needed? completeness

### What feature would you like to be added? we need to test on windows too ### Why is this needed? for platform compatibility

### What happened? https://github.com/microsoft/autogen/security/dependabot/33 ### What did you expect to happen? dependabot clean ### How can we reproduce it (as minimally and precisely as possible)? see https://github.com/microsoft/autogen/security/dependabot/33 ### AutoGen version...

fixes #4635

### What happened? ``` public void Update(RpcRequest request, Activity? activity = null) { DistributedContextPropagator.Inject(activity, request.Metadata, static (carrier, key, value) => ((IDictionary)carrier!)[key] = value); } ``` if key isn't already defined...