update: 22939 quality-filtered hard examples (was 22970)

Fix fusion360_hard_renders.zip: flat structure (no subdir prefix in zip)

Fix deepcad_hard_renders.zip: flat structure (no subdir prefix in zip)

Update fusion360_hard_renders.zip: 22970 hard examples (was ~6861)

Update deepcad_hard_renders.zip: 22970 hard examples (was ~6861)

Update combined_hard_stls.zip: 22970 hard examples (was ~6861)

Update combined_hard.pkl: 22970 hard examples (was ~6861)

Upload fusion360_hard_renders.zip with huggingface_hub

Upload deepcad_hard_renders.zip with huggingface_hub

Upload combined_hard_stls.zip with huggingface_hub

Upload fusion360_hard_scores.jsonl with huggingface_hub

Upload deepcad_hard_scores.jsonl with huggingface_hub

Upload combined_hard.pkl with huggingface_hub

Upload fusion360_hard_stls.zip with huggingface_hub

Upload deepcad_hard_stls.zip with huggingface_hub

Upload combined_hard.pkl with huggingface_hub

initial commit