Refactor models and endpoints, add logging, and improve error handling.

src/routes/movie.py

@@ -18,7 +18,11 @@ async def get_movies():
 
 @router.get("/next", response_model=Movie)
 async def get_next_movie_endpoint():
-    """Get the next movie to watch"""
+    """Get the next movie to watch
+
+    Returns:
+        Movie: The next movie to watch
+    """
     next_movie = get_next_movie()
     if next_movie is None:
         return Response(