5d5e3641

By: Michael Lynch <git@mtlynch.io>

Document the heartbeat as a second, independent monitor

The Cronitor section only described the hourly /login liveness check.
Note that the new heartbeat-url (previous commit) catches a failure mode
that check structurally cannot see: a replica that has silently stopped
syncing while the app keeps serving requests normally.

Co-Authored-By: Claude <noreply@anthropic.com>

Suite timing

Time to Start Worker time Duration Time to finish Idle
Config 28s 5s 5s 34s 28s
Eval 45s 1m25s 1m25s 2m11s 11s
Build 2m10s 6m09s 4m51s 7m01s 2m12s
Suite 28s 7m40s 6m32s 7m01s 2m53s

Timeline

0s1m1m20s1m40s2m4m4m20s4m40s5m5m20s5m40s6m40s7m