feat(api): add movie CRUD API (#56)

crates/arr-db/migrations/0003_movie_releases.sql

@@ -0,0 +1,9 @@
+-- A release can be returned for more than one title search. Keep the cached
+-- release itself unique by indexer/guid and record each movie association.
+CREATE TABLE movie_releases (
+    movie_id   INTEGER NOT NULL REFERENCES movies (id) ON DELETE CASCADE,
+    release_id INTEGER NOT NULL REFERENCES releases (id) ON DELETE CASCADE,
+    PRIMARY KEY (movie_id, release_id)
+) STRICT;
+
+CREATE INDEX movie_releases_release ON movie_releases (release_id);