description

Canonical, human-readable form of this schedule, such as every 5m or cron '0 9 * * 1-5' Europe/Oslo.

Contract: the description must be STABLE for an unchanged schedule and MUST change when the fire times change. It is part of the fingerprint the runtime uses to detect definition changes; a description that varies between processes or restarts makes the runtime reset the schedule's next fire time on every start.