How can the lazyconfig_train_net.py validation image be visualized

## 📚 needs-more-info

Hello, I would like to ask how to get the visualized coco_instances_results.json file after lazyconfig_train_net.py training. For example, training with train_net.py will produce the inference file, help me

Start by reading the issue's references to lazyconfig_train_net.py, train_net.py, and coco_instances_results.json, then compare how each training entry point produces validation output. The issue does not identify a file, test, or desired documentation location; done would require a confirmed explanation of how to visualize the validation results and where to document it.

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