Clarify complete free catalog and premium assets (part 2)

Publish complete 601-exercise free catalog (part 5)

Reduce the free-tier snapshot to 250 exercises (part 2)

Make premium explorer CTA prominent

Link to interactive premium explorer

Tag repdb.co links with utm_source=huggingface

Point download links at exercise-dataset.com (part 2)

Embed the premium-samples animation preview in the dataset card

Rename upgrade-samples to premium-samples; narrow to bent-over-db-row, drop evaluation-only restriction (part 4)

Expand free tier to 400 exercises and add attribution snippets (part 2)

Upload folder using huggingface_hub (part 3)

Add RepDB exercise dataset (free 21-exercise sample)