This is a small reproduction repository to showcase the exception
System.Collections.Generic.KeyNotFoundException: The given key 'WebApi.Features.Dummy.GetDummy' was not present in the dictionary.
when using FastEndpoints with Aspire.
The problem arises as the HttpClient extensions shipped by FastEndpoints are filling the appropriate
TestUrlCache, but for some strange reason when the test wants to get the endpoint from that dictionary
it is empty.