ObjectScale blocks root SSH by default; only admin accepts login. Bootstrap installs cluster key for admin and root; document in ssh-mesh.md.
- Translate all documentation to English - Add docs/ssh-mesh.md and scripts/setup/setup-ssh-mesh.sh - Add config/hosts/atc-lab.hosts for /etc/hosts on all VMs - Ignore atc_cluster private key in git; mesh deployed on 12 hosts