[codex] Sync student-facing Notebook 4 (D-Wave)

[bernalde]

Closes #8.

Summary

This PR aligns the Python and Julia Notebook 4 materials at the student-facing level without changing the executable notebook logic.

What Changed

• aligned the Notebook 4 section flow around the problem statement, example, quantum annealing section, and references
• added Python-side environment and execution notes near the setup/import area
• added explicit Python-side D-Wave account guidance around dwave setup, dwave ping, and DWaveSampler()
• synchronized the QUBO notation in the problem statement and matrix-definition walkthrough
• updated the Julia Notebook 4 metadata version so it matches the committed Julia environment
• added a Notebook 4 pair-sync test module that checks headings, setup guidance, references, notation, and Julia metadata

Validation

• /home/bernalde/repos/QuIP/.venv/bin/python -m unittest tests.test_notebook4_pair_sync
• /home/bernalde/repos/QuIP/.venv/bin/python -m unittest discover -s tests
• ~/.local/bin/uv run --group docs python -m unittest discover -s tests

[review-notebook-app]

Check out this pull request on 

See visual diffs & provide feedback on Jupyter Notebooks.

---

Powered by ReviewNB

[bernalde]

This is lacking to mention the DWave.jl package and more importantly we need to make sure that it works with the latest version of the package

Reply via ReviewNB

[bernalde]

We need to add more references here

Reply via ReviewNB

[bernalde]

If we are going to redefine the constant as beta, then the code below needs to also follow that as it still defines the variable as cQ

Reply via ReviewNB