eval --debug mode to skip Rich

[willccbb]

Description

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Test improvement

Testing

• All existing tests pass when running uv run pytest locally.
• New tests have been added to cover the changes

Checklist

• My code follows the style guidelines of this project as outlined in AGENTS.md
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Additional Notes

---

Note

Introduces a non-Rich execution path for evals and documents the new flag.

• Adds --debug/-d to prime eval to disable Rich UI and use standard logging + tqdm
• eval.py: when --debug is set, calls run_evaluations; otherwise continues using run_evaluations_tui (with --tui controlling screen mode)
• Updates docs (docs/evaluation.md) to include the new flag; adjusts tests to include debug in CLI defaults

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