Switch VM boot order/disks to scsi0 to match cloned NixOS template boot layout, add destroy guards to plan/apply workflows, and replace destroy workflow with a confirmed manual dispatch nuke flow that uses remote B2 state.
Configure an s3 backend and initialize Terraform in CI with backend config from Gitea secrets so state persists across runs and apply operations stay consistent.
- Restore pm_api_token_id and pm_api_token_secret variables
- Use TF_VAR_pm_api_token_id and TF_VAR_pm_api_token_secret env vars
- This is the standard Terraform way to pass variables via environment
- 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
