feat(db): store poster, backdrop and rating on titles

§9.6 keeps rich detail out of the database except for the three fields
pure-SQL views need. Adds poster_path, backdrop_path and vote_average to
movies and series, written by the daily metadata refresh in both lanes
and filled at add time from the TMDB response the create flows already
fetch.

.sqlx/query-f8bfa60fa2f328f8daba030616793728f7acb1eb4b4ec08bd36d9fbc5aed28d4.json

@@ -0,0 +1,12 @@
+{
+  "db_name": "SQLite",
+  "query": "INSERT INTO movies (tmdb_id, title, year, original_language, root_id, wanted, blocked, overrides, poster_path, backdrop_path, vote_average) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Right": 11
+    },
+    "nullable": []
+  },
+  "hash": "f8bfa60fa2f328f8daba030616793728f7acb1eb4b4ec08bd36d9fbc5aed28d4"
+}