🎨 SourceIterator can yield addtitional data

SourceIterator-s can yield a game and a tuple of additional data.
This data will be passed to the Store, Pipeline and Managers.

src/store/managers/steam_api_manager.py

@@ -15,7 +15,7 @@ class SteamAPIManager(AsyncManager):
 
     retryable_on = set((HTTPError, SSLError))
 
-    def manager_logic(self, game: Game) -> None:
+    def manager_logic(self, game: Game, _additional_data: tuple) -> None:
         # Skip non-steam games
         if not game.source.startswith("steam_"):
             return