fix(memory): fix the bug in redis memory that use bytes data as the message key (#1146)

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: DavdGao

src/agentscope/memory/_working_memory/_redis_memory.py

@@ -88,6 +88,7 @@ def __init__(
             db=db,
             password=password,
             connection_pool=connection_pool,
+            decode_responses=True,
             **kwargs,
         )
 
@@ -559,9 +560,17 @@ async def update_messages_mark(
         await pipe.execute()
         return updated_count
 
-    async def close(self) -> None:
-        """Close the Redis client connection."""
-        await self._client.close()
+    async def close(self, close_connection_pool: bool | None = None) -> None:
+        """Close the Redis client connection.
+
+        Args:
+            close_connection_pool (`bool | None`, optional):
+                Decides whether to close the connection pool used by this
+                Redis client, overriding Redis.auto_close_connection_pool.
+                By default, let Redis.auto_close_connection_pool decide
+                whether to close the connection pool
+        """
+        await self._client.aclose(close_connection_pool=close_connection_pool)
 
     async def __aenter__(self) -> "RedisMemory":
         """Enter the async context manager.