fix(iroh-gossip): clarify docs and semantics of gossip joined event #2597
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Description
Improves documentation around the
GossipEvent::Joined
event: It is only emitted once at the beginning of the stream, and the event will not be emitted when awaitingGossipReceiver::joined
.Also makes sure that the event is actually only emitted once per intent (it potentially could have been emitted multiple times before if the neighbor count first got down to 0 and then up again for
GossipTopics
subscribing inbetween).Breaking Changes
Notes & open questions
Inspired by the discussion in deltachat/deltachat-core-rust#5860
Change checklist