-- Additive: records when Lidarr accepted the add (POST artist/album)
-- for an approved request. NULL = not yet sent/confirmed; the
-- reconciler idempotently (re)sends the add until this is set, then
-- watches for the import. Decouples the durable admin approval from the
-- best-effort Lidarr call so a transient Lidarr outage no longer forces
-- a manual re-approve.
ALTER TABLE lidarr_requests
    ADD COLUMN lidarr_add_confirmed_at timestamptz;