atproto_firehose: load disabled accounts into in-memory DIDs

[snarfed]

Right now, atproto-hub keeps the DIDs of all accounts bridged into and out of Bluesky in memory, and updates them every 10s. It only adds to them, though; it doesn't remove them when they're disabled. We handle disabled accounts fine later on, in receive tasks, but this means that when we disable acounts due to volume/overuse, eg #1669, it doesn't take effect in atproto-hub until we restart it.

We should drop the status/enabled_protocols filters from these queries, check those in memory, and remove DIDs that got disabled. (Or do two queries.)

bridgy-fed/atproto_firehose.py

Lines 87 to 97 in 9e2479e

	atproto_query = ATProto.query(ATProto.enabled_protocols != None,
	ATProto.updated > atproto_loaded_at)
	loaded_at = ATProto.query().order(-ATProto.updated).get().updated
	new_atproto = [key.id() for key in atproto_query.iter(keys_only=True)]
	atproto_dids.update(new_atproto)
	# set *after* we populate atproto_dids so that if we crash earlier, we
	# re-query from the earlier timestamp
	atproto_loaded_at = loaded_at
	bridged_query = AtpRepo.query(AtpRepo.status == None,
	AtpRepo.created > bridged_loaded_at)