Ties the existing /etc/rancher/k3s/config.yaml kubelet-arg (system-reserved=8Gi, eviction-hard<2Gi) to the 2026-04-19 OOM freeze incident so it won't be flagged as mystery asymmetry in future audits. Closes item 6 of 2026-04-20 K3s improvements. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>