Astronomer change history: Incorrect scheduler heartbeat metrics being reported

Astronomer reported a major degradation from 2026-08-18 18:51 UTC to 2026-09-10 22:19 UTC, lasting 23 days 3 h. A metrics reporting bug falsely flagged missed scheduler heartbeats, affecting Astro UI dashboard and monitoring visibility; task execution, scheduling, and workflow processing were unaffected. Astronomer reported rolling out a fix and later marked the issue resolved.