bench-run.sh: identical test shape everywhere (4k rand rw, 1M seq rw, direct IO, grep-able BENCH| lines) - runs in guests, LXCs, containers. install-bench.sh for Debian guests/LXCs; Dockerfile for registry image; lxc-bench-setup.sh stands up the host-side bench LXC (proxmox = no docker). Ticket: https://projects.knownelement.com/issues/709