feat: MovieDto enrichment, movie detail page, PWA, watchlist, watchlist federation

crates/adapters/sqlite/migrations/0016_watchlist.sql

@@ -0,0 +1,9 @@
+CREATE TABLE IF NOT EXISTS watchlist_entries (
+    id        TEXT PRIMARY KEY NOT NULL,
+    user_id   TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    movie_id  TEXT NOT NULL REFERENCES movies(id) ON DELETE CASCADE,
+    added_at  TEXT NOT NULL,
+    UNIQUE(user_id, movie_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_watchlist_user ON watchlist_entries(user_id, added_at DESC);