The old proxmox-nix-cache VM was destroyed and nix-cache is being
redeployed as an LXC container going forward. Without this update,
create-proxmox-resource.sh's duplicate-host check (which only reads this
static list, not live Proxmox state) kept refusing to create
lxc-nix-cache even though nothing named nix-cache actually exists on the
node anymore.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>