Drop Python 3.9 add 3.14 and add a few more lints

[ntjohnson1]

Closes #445

• Removed 3.9 references and add 3.14 then ran ruff for auto fixes
• Resolved remaining ruff issues UP/TC
• Added ARG lints then resolved conflicts (unused argument checks)
• Added PIE for some pythonic checks and used autofix
• This also lifts our scipy pin so we can run python 3.14 tests more easily
  • That required disabling a test that in hindsight never made sense. It was calculating eigenvalues of our all zero matrix. No one has complained so I doubt this edge case matters much. For now just disabling the test. If we have bandwidth replacing with a more interesting sparse comparison would be nice.

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📚 Documentation preview 📚: https://pyttb--459.org.readthedocs.build/en/459/