Quick-start: document how to wire the downloaded ckpt into the inference script (model_dir + hardcoded ckpt.pt rename, configurator override, meta.pkl path)

README: HF download snippet, document CSV prompt schema, note nanoGPT-derived inference script

Mirror of github.com/kouroshSA/ppiGPLM + MED4 ckpt_7e checkpoint and sidecar note