- _stream_agent_response_to_redis() publishes chunk/done messages to Redis pub-sub
- _process_message() uses streaming path for web channel with no tools registered
- Non-web channels (Slack, WhatsApp) and tool-enabled agents use non-streaming run_agent()
- streaming_delivered flag prevents double-publish when streaming path is active
- _send_response() web branch changed from 'response' to 'done' message type for consistency