Bump ruff from 0.15.9 to 0.15.12

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.15.9 to 0.15.12.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.15.9...0.15.12)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.15.12
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

dev_requirements.txt

@@ -10,7 +10,7 @@ mss==10.2.0
 defusedxml==0.7.1
 
 # Quality tooling — used by .github/workflows/quality.yml and locally.
-ruff==0.15.9
+ruff==0.15.12
 bandit==1.9.4
 pytest==9.0.2
 pytest-timeout==2.4.0