The trace list joined every trace packet to ~50M observations to apply
the IATA filter; the parallel hash join overran docker's 64MB /dev/shm
and the filtered list errored. Keep a small trace_iatas table at ingest
(like channel_iatas) and group packets by tag instead. Filtered stats
are now per tag rather than per matching packet.
Refresh last_heard on duplicate observations too, capped at hourly, so
steady traffic can't age a channel out of the filter while its packets
stay retained (dedup key has no heard_at). Guard the seed join against
the docker /dev/shm cap like the trace one, and drop the unused
last_heard index column so the upserts stay HOT.
The IATA filter ran a correlated EXISTS over packets/observations with
ILIKE, which skipped the iata index and took ~7s live. Keep a small
channel_iatas table at ingest (like node_iatas) and filter against it.
Also honor the iatas= param so multi-site regions stop getting the
global list. Filter now ages out with packet retention rather than
matching any retained packet.
MrAlders0n