The curated 'get this' list. Atomic units are movies and episodes; adding a
whole show/season expands into episode rows (show/season are bulk ops). Upcoming
episodes stay out — the watchlist/calendar promote them once they air.
- video_wishlist table + two partial unique indexes (one per movie tmdb_id, one
per (show tmdb_id, season, episode)) so the shapes don't collide and re-adds
upsert. SCHEMA_VERSION 8 -> 9 (executescript creates it on existing DBs).
- DB: add_movie_to_wishlist, add_episodes_to_wishlist (bulk), remove_from_wishlist
(movie/show/season/episode scope), query_wishlist (movies | shows grouped
show->season->episode w/ wanted/done roll-ups, searched+paged), wishlist_counts,
wishlist_state (hydration).
Tests: +7 (idempotent upserts, show-tree grouping, scoped removes, movie/episode
same-tmdb don't collide, hydration, search+paging). DB suite: 68 passed.