-- Optional name on published tariff versions (2026-07-05). The lab's draft workflow gave
-- rate cards human names; published versions were only tellable apart by effective date +
-- UUID prefix. The name is stamped at publish (carried from the lab draft, or typed in the
-- composer) and is immutable like the rest of the row. Nullable — old versions and unnamed
-- publishes are fine.
ALTER TABLE `tariff_versions` ADD `name` text;