Add 4.4.7

[toddbaert]

I think this is a small miss. We didn't explicitly note that errors in a before hook should mean evaluation does not proceed and the default is returned (we did mention error hooks should be triggered, so this could be surmised, but I think this addition makes sense).

I updated a graphic accordingly.

One question is if we should add a 4.4.8 that explicitly mentions the provider should not be called in this case... this might be a good idea, since if an implementation still calls the provider (despite returning the default), there may be side-effects in the flag evaluation service that have incorrect data due to a misbehaving before hook.

[toddbaert]

Merging this without a 4.4.8 for now. We can always revisit that later.