provisioning-server-ssh.nu: loads only servers/ssh.nu (~190ms parse).
Routes both `prvng ssh <host>` and `prvng server ssh <host>`.
ssh: 931ms → 315ms (-66%).
bash wrapper: st removed from guide case (setup/state alias conflict
resolved in favor of state — state | st) wins as pre-existing binding).
server|s) now routes ssh sub-command to provisioning-server-ssh.nu
