Serve the 5-fold CNN ensemble instead of one checkpoint

Force CPU device explicitly (ZeroGPU makes cuda.is_available() report True outside a real grant, breaking auto-detection)

Add a dummy @spaces.GPU function to satisfy ZeroGPU startup check (never called; inference stays CPU-only)

Disable Gradio SSR mode (Node proxy was being stopped by the Spaces supervisor)

Import spaces package for ZeroGPU registration (fixes runtime error)

Deploy DR screening Gradio demo (app.py fetches weights from the model repo)