Hex change history: Degraded kernel acquisition

Hex reported critical degradation of kernel acquisition from 2025-05-13 14:38 UTC to 2025-05-13 19:10 UTC, lasting 4 h 32 min. A fix was implemented; the postmortem attributed the incident to an AWS EBS storage issue backing its primary database replica, degrading replica performance and eventually backpressuring critical writes on the primary database.