build(deps-dev): support mypy 2.x

[iMicknl]

Summary

• allow mypy 2.x in the development dependency range
• update the lockfile to mypy 2.3.0
• serialize the mypy pre-commit hook to avoid SQLite cache races

This applies the same cache-concurrency fix used in python-overkiz-api and supersedes the dependency update in #481.

Verification

• uv run prek run --all-files
• uv run pytest (4 passed)
• git diff --check

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