Add UnknownId relay hints to Mention::{Profile,Event}

[ksedgwic]

I marked this as WIP because it depends on damus-io/nostrdb-rs#37

It also does not use the relay hints in the unknown_id_send method yet. I'm unsure how much we want to package in this PR; it is ready to go if we want to enhance unknown_id_send in a follow-on PR.

[ksedgwic]

Marking this as ready for review, but it needs damus-io/nostrdb-rs#37 to be merged

[jb55]

looking at this today

[ksedgwic]

updated w/ nostrdb-rs relays_iter interface

[ksedgwic]

damus-io/nostrdb-rs#37 was merged, updated the dependency

[jb55]

I think we want a different data structure. we should update ids: HashSet<UnknownId> to HashMap<UnknownId, HashSet<RelayUrl>>

The point of the HashSet<UnknownId> is to collect unique ids. We shouldn't be adding duplicates… ids may have different relays on different notes. HashMap<UnknownId, HashSet<RelayUrl>> will enable us to update the relays for a given unknown id as we collect them.

[ksedgwic]

Done

[jb55]

lgtm