Restore Gradio launch block internally, depending on pinned hub version

Omit manual demo launch to let Hugging Face Spaces handle running the app natively

Revert to Gradio SDK 4.26.0 now that huggingface-hub is pinned

Fix Gradio connection crash loop by enforcing 0.0.0.0 bind host

Pin huggingface-hub string length under 0.28.0 to fix Gradio SDK conflicts

Fix Gradio SDK version to 4.44.1 to avert Hugging Face ImportError

Expand training to entire dataset and 3 full epochs.

Initialize Omni-XRay training and deployment pipeline