-- A fifth verdict: "bad", between "ok" and "never".
--
-- "OK" to "Never again" is a big jump and most disappointments live in the gap
-- (user, 2026-07-28). Without it, a merely poor meal either flatters itself as
-- OK or gets blacklisted, and the blacklist is the signal that has to stay
-- sharp — `warn` remains exclusive to 'never' so it is not diluted by every
-- mediocre delivery.
--
-- Safe as a straight widening: no existing row uses a value being removed,
-- because nothing is being removed.
ALTER TABLE order_reviews DROP CONSTRAINT IF EXISTS chk_order_review_rating;

ALTER TABLE order_reviews ADD CONSTRAINT chk_order_review_rating
  CHECK (rating IS NULL OR rating IN ('loved', 'liked', 'ok', 'bad', 'never'));