Nominations: Link previous nomination threads

It would be nice if we could add links to previous nomination threads to both !tp history and newly created nomination threads. As it stands, we have to search for the username in the discord thread history (and this isn’t particularly great UX nor reliable).

Storing the thread ID for a nomination sounds like a good first step (and probably worth committing immediately even before other features are complete?), then searching through threads by username to attempt to rediscover old threads. Since usernames are changeable, we might also want to detect “desynced” talentpool history, where we know there have been X previous nominations, but only found less-than-X threads.

We could also search through threads by time–we know when previous nominations have ended, but we don’t know when they start, so we can use this also to help figure out which threads might be relevant by archive_timestamp or last_pin_timestamp, the latter of which might actually be extremely reliable (given reviews are auto-pinned in their thread).

[shtlrs]

Thanks @wookie184, that gives me a very good basic understanding of how it works!

Yes, I’ll gladly wait on your PR then I’ll tackle this if approved!

[shtlrs]

Here’s a preview of what it would look like

History command

Get review command