Routers: a router in trouble reads 'started 2h ago' or 'all of the last 24 h', from problem_since over the day's history, read for the troubled routers only (a certificate's problem carries its own date). Hosts: a down host reads 'a monitor is down for 3h'; host_glance keeps the down_since host_status already had. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>