Harden public card rendering for reviewer view

[jang1563]

Summary

• replace renderer-dependent public-card Mermaid blocks with static GitHub-readable review tables
• align the Hugging Face size category with the rendered 400 MB dataset size
• add regression checks for static card rendering and HF metadata consistency

Verification

• python3 -m pytest tests/test_review_fixes.py
• python3 -m pytest
• git diff --check