External snapshot control

[MV10]

Provide a public method on the event stream managers and collections to force an update of the domain object (applying new events) and output of a snapshot. This is similar to GetCopyOfState(forceRefresh: true) except that the copy method doesn't guarantee a snapshot.

Additionally, use reflection to detect a bool return from domain event Apply methods, and use that to force an immediate snapshot if the method returns true. Consider - does this imply projections should run in the middle of a sequence of Apply invocations? Make it configurable?