fix circular import errors so the server and start again

server/game_state_store/RedisGameBoardStore.py

@@ -1,6 +1,9 @@
-from server.GameBoard import GameBoard
+from typing import TYPE_CHECKING
 import inspect, pickle
 
+if TYPE_CHECKING:
+  from server.GameBoard import GameBoard
+
 class RedisGameBoardStore:
   def __init__(self, redis_url:str="redis://localhost:6379/0", key_prefix:str="snake:gameboard", ttl_seconds:int=900, **kwargs):
     self.redis_url = redis_url
@@ -23,7 +26,7 @@ class RedisGameBoardStore:
   def _key(self, game_id:str) -> str:
     return f"{self.key_prefix}:{game_id}"
 
-  async def save(self, game_id:str, game_board:GameBoard) -> None:
+  async def save(self, game_id:str, game_board:'GameBoard') -> None:
     redis = await self._get_redis()
     payload = pickle.dumps(game_board, protocol=pickle.HIGHEST_PROTOCOL)
     await redis.set(self._key(game_id), payload, ex=self.ttl_seconds)