Dremio change history: Query engines not scaling up

Dremio Cloud - US had a major incident: query engines failed to scale up on demand, causing query failures; already-running engines remained unaffected. It started at 2022-05-10 05:32 UTC and was resolved at 2022-05-10 06:49 UTC, lasting 1 h 16 min. Dremio reported a successful mitigation and confirmed engine scaling was working normally.