chore: minor fixes and formatting

misc/redis.py

@@ -1,5 +1,4 @@
 import logging
-from typing import Optional
 
 from redis.asyncio import Redis
 
@@ -18,7 +17,7 @@ class RedisClient:
             logger.exception(e)
             return False
 
-    async def get_search_query(self, query_hash: str) -> Optional[str]:
+    async def get_search_query(self, query_hash: str) -> str | None:
         try:
             res = await self.r.get(f"search:{query_hash}")
             return res.decode()