Fix CI: ignore notebook-specific lint errors

[Copilot]

CI was failing on lint errors in Jupytext-converted notebook files that use IPython built-ins and interactive display patterns.

Changes

• pyproject.toml: Added per-file ignores for notebooks/**/*:

  • F821 - allows IPython built-ins like display()
  • B018 - allows standalone expressions used for cell output

• Formatting: Applied ruff format to fix spacing/line-length issues in notebooks, solvers, and tests

The notebook files are dual-format (.py and .ipynb via Jupytext) for version control, but lint as standalone Python which incorrectly flags notebook idioms.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• astral.sh
  • Triggering command: curl -LsSf REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Fix the CI

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