[tests] deflake api_firehose_sources timing

dolt remote info

[backfill] name the unread transition states

[ssrf] couple public egress validation to sockets

[db] write v10 bodies into the compressed heads keyspace

awa

[backfill] stream getRepo with a hard body bound

[backfill] batch full CAR block access

[db] refactor how repo counts are handled

wip