-- A node has an operator account: the human login on it (novox/hq to-be 29).
--
-- The mesh modelled the machine but not the person on it — `jochens` on novox, `ace` on ace,
-- `jochen` on shanks and g14. That name decides who a file under a home is owned by and which
-- account `ssh <node>` logs in as; it was silently lost when the predecessor's per-node `user:`
-- was not carried over, and `ssh ace` failed to `ace` because nothing here said so.
--
-- Empty rather than null and defaulted, because "no operator account known yet" is a real state
-- (a freshly enrolled machine, a headless box). The home is stored too rather than always assumed
-- to be /home/<account>, because root's is /root and a machine may put a home elsewhere; empty
-- means "derive it" (/root for root, /home/<account> otherwise), so the common case needs no entry.
alter table node add column account text not null default '';
alter table node add column account_home text not null default '';