Update an Automation

Den schedules Automations and keeps durable run history; execution is dispatched to the owner's connected desktop app. If no desktop runner is connected when an occurrence is due, that occurrence is recorded as missed. Creation makes an Automation active immediately and uses the owner's current OpenWork Connect integrations. Deactivation stops future runs but does not cancel a run already in progress. Every behavior-changing edit creates an immutable revision and applies it to future runs immediately.