\c dcntrlized;

-- 002_drop_token_version.sql — remove the rotation counter.
--
-- Contract decision (2026-10-18): `rotateSubscribeToken` is gone. The subscribe
-- token is minted once at creation and lives as long as the alert; subscribers
-- are never evicted and there is no rotation lifecycle. `token_version` was the
-- rotation counter and has no remaining reader: no query, view or wire field
-- depends on it (the API stopped serialising `tokenVersion` in the same change).
--
-- `001_alarm_schema.sql` is already applied to the dev database and is never
-- edited in place, so the column is dropped here instead of being removed from
-- the CREATE TABLE. A fresh database applies 001 (which still creates the
-- column) and immediately drops it below; that is intentional and keeps the
-- migration history append-only. The CHECK constraint
-- `alerts_token_version_positive` disappears with the column.
--
-- Idempotent: guarded on the schema/column existing, so re-applying the whole
-- sequence (or applying this file alone to a virgin database) is a clean no-op.

DO $$
BEGIN
    IF EXISTS (SELECT 1 FROM pg_namespace WHERE nspname = 'alarm') THEN
        ALTER TABLE alarm.alerts DROP COLUMN IF EXISTS token_version;
    END IF;
END
$$;