-- #153. `episodes.title` accepted the empty string, which TMDB sends for an
-- unaired episode it has not named yet. Empty titles leaked into §9.2's
-- search haystack, §7.4 filenames and the compat shim as if they were real
-- text. Rows already carrying `''` take the same "TBA" placeholder the TMDB
-- boundary now substitutes — #121's guarded update replaces it once TMDB
-- fills the title in.
--
-- A hard CHECK (title <> '') would need a table rebuild with foreign_keys
-- off, which sqlx 0.8's migrator cannot run (it always wraps a migration in
-- a transaction, where that pragma is a no-op); enforcement lives in code.
UPDATE episodes SET title = 'TBA', updated_at = strftime('%Y-%m-%dT%H:%M:%fZ', 'now') WHERE title = '';