Implement more detailed UA

[nanos]

This is because FediFetcher is apparently responsible for very high load on at least some instances, and this would allow some level of more granular blocking

[p37307]

That's a great addition. Nice job.

[colinstu12]

Is there any way to fedifetcher to keep track of previously queried/retrieved statuses? It seems to check for the same stuff over and over, even if the context has already been retrieved. Not sure if this causes a real bad impact or not on instances but if there's any way to make it less needlessly chatty seems like it would be preferable.

[nanos]

It seems to check for the same stuff over and over, even if the context has already been retrieved.

Context may change (ie more replies added) so it’s expected to re-check context.

But maybe we can do something to slow this down. I’ll think about this a bit more and open an issue for discussion