-- A node names the account its agents run as (novox/hq ADR 0266).
--
-- On the control node every agent session ran as the operator's account, which may become root without
-- a password: any agent there could become root without a person. The decision is an account of the
-- agents' own, without sudo, beside the operator's, who keeps theirs. Stated by the operator at the
-- controller's terminal, like the operator account (migration 0036), and never by a verb or a setting,
-- so no agent can change which account it is.
--
-- Empty rather than null, as the operator account is: empty is a real state, "agents run as the
-- operator's account here" — a workstation's today. The home is stored only when it is not
-- /home/<account>; empty means derive it.
alter table node add column agent_account text not null default '';
alter table node add column agent_account_home text not null default '';