-- Admit the 'vk' platform identity (VK Mini App users) into the identities.kind check
-- constraint, alongside telegram/email/robot. Expand-contract: widening the allowed set
-- is backward-compatible, so a backend image rollback stays DB-safe — the older code
-- simply never writes a 'vk' row. The table shape is unchanged (only the CHECK), so the
-- generated go-jet model is not regenerated.

-- +goose Up
ALTER TABLE backend.identities DROP CONSTRAINT identities_kind_chk;
ALTER TABLE backend.identities ADD CONSTRAINT identities_kind_chk CHECK ((kind = ANY (ARRAY['telegram'::text, 'vk'::text, 'email'::text, 'robot'::text])));

-- +goose Down
ALTER TABLE backend.identities DROP CONSTRAINT identities_kind_chk;
ALTER TABLE backend.identities ADD CONSTRAINT identities_kind_chk CHECK ((kind = ANY (ARRAY['telegram'::text, 'email'::text, 'robot'::text])));