Document and commit the production bootstrap state after the initial Hetzner and Ansible rollout.
- switch Ansible prod runbooks to use the shared vault password file
- record production admin CIDRs, SSH key path, encrypted group vault, and encrypted per-host vault files
- add generated production inventory and the prod setup history notes from the first bootstrap
- keep root password login disabled while preserving key-based root access for Ansible bootstrap continuity
- document separate Hetzner projects and tokens for test/prod and commit the prod provider lock file
- remove the private Redis firewall allowance from the prod Terraform firewall and matching setup docs