Upgrade ruff to 0.16.5 and address new rules

[oschwald]

Dependabot's ruff 0.16 bump fails CI because 0.16 stabilized new rules and started formatting Python fences in Markdown. This PR bumps ruff and addresses the failures.

• Bump ruff to 0.16.5 in uv.lock. The dependabot PR closes when this merges.
• Ignore CPY001 (missing-copyright-notice). We do not want a copyright header on every file.

Each change is its own commit.

STF-1328

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Updated linting configuration to allow source files without copyright headers.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Advanced

Run ID: 7242df6d-0208-4b39-8510-420fdfd62e71

📥 Commits

Reviewing files that changed from the base of the PR and between 4be1670 and 9e92b88.

⛔ Files ignored due to path filters (1)

• uv.lock is excluded by !**/*.lock

📒 Files selected for processing (1)

• pyproject.toml

Included review availability: Your plan provides up to 2 included reviews per hour; 1 remains after this review.

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📝 Walkthrough

Walkthrough

The Ruff lint configuration now ignores CPY001. A comment states that copyright headers are not required on every file.

Changes

Ruff configuration

Layer / File(s)	Summary
Ignore the copyright-header rule pyproject.toml	The Ruff lint ignore list includes CPY001. A comment explains that copyright headers are not required on every file.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to 9e92b

This change disables Ruff's per-file copyright-header check as intended, without altering application behavior or deployment behavior. No merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main changes: upgrading Ruff to version 0.16.5 and addressing newly stabilized lint rules.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch greg/stf-1328-ruff-is-upgraded-in-github-python-repos

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_{A rabbit checks the linting gate
CPY001 must now wait
No header crowns each file
The config hops in style
Clean checks bring a smile}

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