Sendbird patches on top of redis-py 7.1.0

[bellatoris]

Summary

This PR contains all Sendbird-specific patches applied on top of upstream redis-py v7.1.0.

Patches included (9 commits)

1. Envoy Compatibility (c62d8c1)

• Use EVAL instead of SCRIPT LOAD + EVALSHA in NoScriptError fallback
• Fixes compatibility with Envoy proxy which may not handle SCRIPT LOAD properly

2. Sharded PubSub - Replica Support (03285de)

• Add replica=False parameter to ClusterPubSub.__init__
• Allow reading from replicas on cluster pubsub subscribe

3. Sharded PubSub - Send One by One (a9cc9eb)

• Send ssubscribe commands one by one for Redis cluster

4. Sharded PubSub - By Slot (a55e5d5)

• Subscribe to keys separately by slot for proper cluster routing

5. PubSub Connection Lock (b335145)

• Add _connection_lock to PubSub.execute_command
• Ensures only one connection is created in concurrent scenarios

6. BaseException Handling in Pipeline (0b6aba3)

• Add outer except BaseException handler in PipelineStrategy._send_cluster_commands
• Disconnect connections before releasing on unexpected exceptions
• Add n.connection = None and clear nodes dict in inner exception handler
• Add 0.25s sleep on exception for connection pool recovery

7. is_supported_error + Improved Error Handling (3185418)

• Add is_supported_error() method to AbstractRetry class
• Update inner get_connection handler to catch BaseException
• Apply backoff sleep when error is a supported retry error type
• Only reinitialize nodes manager on ConnectionError/TimeoutError

8. repr for Debugging (22e170b)

• Add __repr__ to PipelineCommand and NodeCommands for easier debugging

9. Version Bump (87194d6)

• Set version to 7.1.0+sb1 (PEP 440 compliant)

Tag

7.1.0.sb1 - Points to the version bump commit

Review Checklist

• Script.__call__ uses eval() not script_load() in NoScriptError handler
• ClusterPubSub.__init__ has replica parameter
• PubSub.execute_command has _connection_lock
• PipelineStrategy._send_cluster_commands has outer except BaseException
• AbstractRetry has is_supported_error() method
• Inner get_connection catches BaseException not just (ConnectionError, TimeoutError)
• Version is 7.1.0+sb1