{"checks":[{"age_s":9,"detail":"cohort event log","name":"cohort_feed","ok":true},{"age_s":0,"detail":"1227 mids in 0.23s","name":"exchange_api","ok":true},{"age_s":249663,"detail":"2026-09-20 population, 69.4h old","name":"membership_seed","ok":false},{"age_s":249677,"detail":"2026-09-20 complete, 99.5% coverage","name":"archive","ok":false}],"note":"Ages are measured from the newest fact in each feed, never from an upstream's own status field.","ok":false,"served_at":1790220592.141813,"source":"live","worst_age_s":249677}