Bump mypy from 1.18.2 to 1.19.0

Bumps [mypy](https://github.com/python/mypy) from 1.18.2 to 1.19.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.18.2...v1.19.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.19.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements/test.txt

@@ -2,7 +2,7 @@ pylint==4.0.3
 ruff==0.14.7
 flake8==7.3.0
 isort==7.0.0
-mypy==1.18.2
+mypy==1.19.0
 types-protobuf==6.32.1.20251105
 pytest>=6.2.4,<10
 pytest-asyncio==1.3.0