v0.1.2

Platform reach only (spec docs/specs/2026-10-10-setu-0.1.2-design.md):
nothing about how Setu works changes.

Platforms

• aarch64 (64-bit ARM): every release ships setu-<ver>-aarch64-unknown-linux-musl.tar.gz
  next to the x86_64 archive, built natively; install.sh picks the
  archive from the machine type.
• Ubuntu 22.04 and 24.04, Debian 12 and 13, on x86_64 and aarch64. The
  installer and setu agent install read /etc/os-release; PostgreSQL
  16 comes from the PGDG apt repository where the distribution has no
  16 (Ubuntu 22.04, Debian 12; the key is pinned by SHA-256), 17 on
  Debian 13. Other distributions are refused unless --force-distro,
  which uses the Debian 12 plan and says so.
• Provisioning and updates refuse a manifest that has no binary for the
  server's architecture (a validation error that names the app and
  the server's target);
  the site create request is refused early with a 400.

Upgrading

• On a panel box: install.sh --version 0.1.2 with the original flags;
  the installer restarts setu and the local agent only when the
  binary changed.