f12d4f0b12
The original auth commit shipped the in-memory session store with just Issue and Valid. The Slice-2 /api/logout handler and the audit-trail (user column on each deployment) need: - User(tok): look up the username for a valid session. - Revoke(tok): drop a session; used by /api/logout. Tiny follow-up — kept as its own commit because the rest of the auth work had already shipped in the parent commit by the time the dashboard's logout button and the deployment-audit-trail surfaced the need for these methods.