Handlers and Middlewares processing union

Call for handlers now union in a single function for future extension.

Plus minor fixes in storages.

telebot/storage/memory_storage.py

@@ -3,6 +3,7 @@ from telebot.storage.base_storage import StateStorageBase, StateContext
 
 class StateMemoryStorage(StateStorageBase):
     def __init__(self) -> None:
+        super().__init__()
         self.data = {}
         #
         # {chat_id: {user_id: {'state': None, 'data': {}}, ...}, ...}