Support redis-py 7.x (Python 3.13 compatibility)

[omni-client]

Context

I'm using langgraph-checkpoint-redis with Python 3.13 for conversation memory in a LangGraph
agent.

Problem

Python 3.13 raises this error when using the Redis checkpointer:

File "redis/commands/helpers.py", line 115, in get_protocol_version
if isinstance(client, redis.Redis) or isinstance(client, redis.asyncio.Redis):
TypeError: isinstance() arg 2 must be a type, a tuple of types, or a union

Research Done

1. Root cause: Python 3.13 made isinstance() stricter with typing constructs
2. Fix exists: redis-py 7.1.0 includes the fix
   • Python 3.13 not officially supported despite releasing last October  redis/redis-py#3501
   • maintenance: Python 3.13 compatibility redis/redis-py#3510
3. Blocker: langgraph-checkpoint-redis constrains redis>=5.2.1,<7.0.0

Request

Update the redis dependency to allow 7.x:

redis = ">=5.2.1"  # or ">=7.1.0"

Current Workaround

I'm monkey-patching get_protocol_version() to avoid the isinstance check, but would prefer using
the upstream fix.

Environment

• Python 3.13
• langgraph-checkpoint-redis 0.2.1
• redis 6.4.0

I'm open to taking the issue on if there are no takers

[vishal-bala]

Related to this - since the dependency on redisvl currently has an indirect constraint of redis-py <7.0.0 - the next version of redisvl planned for next week will add support for redis-py 7.x.