This commit updates the documentation and Terraform variables to reflect recent changes in the Proxmox environment setup.
- `docs/proxmox-setup.md`: Added `VM.GuestAgent.Audit` and `VM.GuestAgent.FileRead` to the required privileges list and the CLI command example. This ensures Terraform can properly interact with the QEMU Guest Agent.
- `terraform/prod/variables.tf`: Set a default value ("damien") for the `username` variable in the `virtual_machines` object to simplify configuration for the primary user.
Updates the `bpg/proxmox` Terraform provider from version 0.43.0 to 0.89.0 in the production lock file to pull in the latest upstream changes.
Additionally, applies automatic markdown formatting to tables in `docs/proxmox-setup.md` to align columns and improve readability.