3 (Automation & Cluster)**: RKE2 cluster deployment, ArgoCD gitops pipeline, and automation tooling

Tracking ticket for a line in release 3.0.0.0 that shipped without one.

Phase 3 (Automation & Cluster): RKE2 cluster deployment, ArgoCD gitops pipeline, and automation tooling established across the cluster fleet.

Created retroactively so every changelog line has a ticket a reader can follow.