- Use HTTPS for arXiv API (was returning 301 on HTTP)
- Point module 01 preliminaries to root uv sync instead of separate venv
- Clone nanoGPT into 01-nanogpt/ and add to .gitignore
- Add llama3.1:8B to module 02 models table
- Various editorial updates to modules 01 and 02
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>