chore: pin ruff to 0.15.22

[tylerjroach]

Summary

uvx ruff (no version specifier) resolves to whatever ruff is latest — 0.16.0 just released and changed two things simultaneously:

1. Format now rewrites Python code blocks inside .md files (caught README.md + .github/copilot-instructions.md).
2. Lint added CPY001 (missing copyright header) among other new rules, which the repo's select = ["ALL"] config picks up automatically.

Both failures started hitting master pushes as soon as uvx resolved 0.16 — see run 30390726259 on this PR (lint) and run 30389789981 (format) on the previous master push.

Fix

Pin uvx ruff@0.15.22 in the two lint job commands. That's the last stable release before the 0.16 shift.

select = ["ALL"] is inherently unstable across ruff minor releases — every new release adds new rules. Pinning removes that class of surprise. Longer term, either replace ["ALL"] with an explicit rule list or bump the pin deliberately (and address any new rules) rather than letting CI auto-adopt them.

Diff

Two lines in .github/workflows/test.yml:

• uvx ruff format --check . → uvx ruff@0.15.22 format --check .
• uvx ruff check . → uvx ruff@0.15.22 check .

Test plan

• Local ruff 0.15.22 — format --check . → 16 files formatted. check . → All checks passed.
• CI on this PR should pass both Check formatting and Check linting steps.

🤖 Generated with Claude Code

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
.github/workflows/test.yml	Pins both Ruff CI invocations to version 0.15.22.

_{Reviews (2): Last reviewed commit: "Pin ruff to 0.15.22 in CI" | Re-trigger Greptile}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.25%. Comparing base (7dbb576) to head (d5e1aaa).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #189   +/-   ##
=======================================
  Coverage   96.25%   96.25%           
=======================================
  Files          13       13           
  Lines        2616     2616           
  Branches      139      139           
=======================================
  Hits         2518     2518           
  Misses         64       64           
  Partials       34       34           

Flag	Coverage Δ
openfeature-provider	54.06% <ø> (ø)

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