Implement streaming for Letta API calls to prevent 524 timeouts
- Replace synchronous agents.messages.create with create_stream
- Add step streaming with max_steps=100 for better responsiveness
- Increase client timeout from 5 to 10 minutes
- Add condensed info-level logging for streaming chunks with emojis
- Add debug-level logging for full chunk details
- Maintain backward compatibility with existing response handling
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Co-Authored-By: Claude <noreply@anthropic.com>