- Point clone_template to nixos-template and trim cloud-init to Nix-safe hostname/DNS only
- Remove SSH/Tailscale cloud-init variables and workflow secret dependencies
- Add reusable NixOS template-base config with bootloader, Tailscale, fish, and utility packages
- Store non-sensitive Proxmox token id in terraform.tfvars
- Inject only token secret via workflow-generated secrets.auto.tfvars
- Add variable validations for token id format and non-empty token secret
- Add workflow debug output for token secret length and selected token id
- Remove token from Terraform variables (provider reads from env)
- Update workflows to set PM_API_TOKEN_ID and PM_API_TOKEN_SECRET directly
- Provider now reads credentials from environment variables
- Replace user/password auth with API token auth
- Update provider config to use pm_api_token_id and pm_api_token_secret
- Update workflow secrets to use PM_API_TOKEN_ID and PM_API_TOKEN_SECRET
- Remove unused pm_user and proxmox_password variables
