Potential experiments

fix(worker): count each channel once in a bulk reindex (#2286)

Merge remote-tracking branch 'origin/canary' into canary

fix(ci): firebase test file location

Merge remote-tracking branch 'origin/canary' into canary

chore(expressions): remove the pack residue cleanup tool (#2288)

fix(worker): keep attachment decay state on a stale expiry row (#2285)

fix(voice): finish the reconciliation sweep before stopping

fix(gateway): release the user session count on a handoff fence (#2284)

fix(gateway): clamp a heartbeat ack to the session sequence (#2283)

fix(worker): resubscribe when the job stream ends unexpectedly (#2282)

fix(worker): renew the deletion queue lock during a rebuild

fix(gateway): group debounced reactions by their own message (#2281)

chore(expressions): remove the pack residue cleanup tool

fix(gateway): clear the presence pid cache on a presence down (#2279)

fix(worker): stop replaying requeued asset deletions in a run (#2280)

fix(worker): count each channel once in a bulk reindex

fix(gateway): drop the channel engine on an empty range list (#2278)

fix(worker): keep attachment decay state on a stale expiry row

fix(gateway): release the user session count on a handoff fence

fix(gateway): stop a non-map opcode payload crashing the socket (#2277)