Improve multi-agent logging clarity and reduce noise
- Add agent name prefix to all log messages for multi-agent identification
- Suppress noisy HTTP logs from httpx/httpcore/letta client libraries
- Improve agent connection display with cleaner formatting
- Add better debug logging for message flow tracking
- Consolidate verbose logs to debug level for cleaner output
- Make agent status more prominent with bold formatting
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Co-Authored-By: Claude <noreply@anthropic.com>