-- Last agent apply report per device. reported_generation keeps its meaning
-- (last applied generation); these columns hold the latest report of any kind.
ALTER TABLE devices
    ADD COLUMN status TEXT NOT NULL DEFAULT '' CHECK (status IN ('', 'applied', 'reverted', 'failed')),
    ADD COLUMN status_generation BIGINT NOT NULL DEFAULT 0,
    ADD COLUMN status_error TEXT NOT NULL DEFAULT '',
    ADD COLUMN status_at TIMESTAMPTZ;