-- 0011_missing_since.sql — record how long a file or item has been missing.
--
-- `missing` says a file is gone; `missing_since` says for how long. That age is
-- the whole point: it is what lets an admin tell a drive that is merely
-- unplugged from content that is genuinely deleted, and therefore whether the
-- explicit purge is safe to run. Without it every rescan would refresh the
-- timestamp and a file that has been gone for months would look "just now
-- missing" on every pass.

ALTER TABLE media_items ADD COLUMN missing_since TEXT NOT NULL DEFAULT '';
ALTER TABLE media_files ADD COLUMN missing_since TEXT NOT NULL DEFAULT '';