debug: enable INFO logging in LiteLLM for troubleshooting

Enable detailed logging to debug qwen model requests from WebUI.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

ai/compose.yaml

@@ -104,7 +104,7 @@ services:
       NO_DOCS: 'true'
       NO_REDOC: 'true'
       # Performance optimizations
-      LITELLM_LOG: 'ERROR'  # Only log errors
+      LITELLM_LOG: 'INFO'  # Enable detailed logging for debugging
       LITELLM_MODE: 'PRODUCTION'  # Production mode for better performance
     volumes:
       - ./litellm-config.yaml:/app/litellm-config.yaml:ro