TRip: capitalize RQ job statuses in related endpoints, order job list, other: minor/typing

lyric_search/sources/cache.py

@@ -66,6 +66,8 @@ class Cache:
                         confidence=row["confidence"],
                     )
         else:
+            if not sqlite_rows:
+                return None
             for row in sqlite_rows:
                 if row[0] == matched_id:
                     (_id, artist, song, lyrics, original_src) = row[:-1]