Report fused model summary by default

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhanced YOLO model reporting with model fusion feature.

📊 Key Changes

• Added code to fuse the model just before reporting the model summary if no exception occurs during model configuration.

🎯 Purpose & Impact

• Purpose: To provide a more optimized and efficient version of the model when printing the summary, which can lead to performance gains during inference.
• Impact: Users can see a more accurate representation of the model's operational state, potentially with better speed and reduced memory usage thanks to layer fusion. This change is expected to improve user experience by providing more insightful information about the model's structure.