🎨 Made manager attributes more flexible

Changed run_after, retryable_on and continue_on to be type Container.
We don't need them to be sets.

The performance gain of sets over small tuples is nonexistant
for in checks and the  syntax is more verbose.

src/store/managers/sgdb_manager.py

@@ -13,8 +13,8 @@ from src.utils.steamgriddb import SGDBAuthError, SGDBHelper
 class SGDBManager(AsyncManager):
     """Manager in charge of downloading a game's cover from steamgriddb"""
 
-    run_after = set((SteamAPIManager, LocalCoverManager, ItchCoverManager))
-    retryable_on = set((HTTPError, SSLError, ConnectionError, JSONDecodeError))
+    run_after = (SteamAPIManager, LocalCoverManager, ItchCoverManager)
+    retryable_on = (HTTPError, SSLError, ConnectionError, JSONDecodeError)
 
     def manager_logic(self, game: Game, _additional_data: dict) -> None:
         try: