Hourly activity read raw rows only 3h back, so a longer rollup backlog left
hours drawn as zero. The raw tail now starts at the newest complete rollup
hour, capped at the 24h raw holdback, and the response reports rolledUntil
and rawFrom so clients can show anything still uncovered.
Stats endpoints read hourly rollup tables filled once per closed hour by one
advisory-locked task, instead of materialized views that re-scanned every
observation on each refresh. IATA-set tables give exact distinct counts for any
IATA set or region. Cleanup holds raw rows for unrolled hours (up to 24h).
Adds /stats/series; ingest keeps packet observation counts, observer last IATA,
channel message counts and trace tag summaries. 001_baseline.sql is rewritten,
so pre-release 2.0 databases must be recreated. See docs/historical-stats.md.
MrAlders0n