This now also includes reworking the attribute which activates
Autofixture-style resolution upon an IServiceProvider.
This has now been renamed to WithAutofixtureResolutionAttribute.
The new/reworked attribute is composable with other Autofixture
attributes.
This extension method is quite complex and is frustrating
when a unit test passes-through it. That's because extension
methods can't be mocked in tests.
The triggers-for-activity-blueprint functionality
is quite complex just on its own, so I have moved this to
a new service.
Once again the integration test which is left behind proves
that it still does the same job.