Adds optional cloudflare_talos_sans (machine.certSANs, talos API :50000) and cloudflare_apiserver_sans (cluster.apiServer.certSANs, kube-apiserver :6443) per control-plane node. cp-1 gets cp1.homelab + cp1-talos.homelab; cp-2/cp-3 get their cpN-talos.homelab. Values set in gitignored tfvars.