chore: clarify event/domain scoping, lifecycle

[toddbaert]

Adding some additional non-normative text to clarify a few things at the prompt of @federicobond .

The meaning and justification should be self-evident, and if it's not I did a bad job. :sweat_smile:

[federicobond]

Looks good to me! Sorry about the delay, I'm moving out to another country this week 😅