[FIX] Handle non-UTF-8 output from subprocess tools

[Mirochill]

This PR...

• Avoids UnicodeDecodeError when external map tooling writes non-UTF-8 bytes to stdout or stderr.

Considerations and implementations

run_subprocess_and_log_output() keeps decoding subprocess output as UTF-8, but now passes errors="backslashreplace" to subprocess.run(). This prevents bytes such as 0xa0 from raising while still making undecodable bytes visible in the captured log output.

Closes #271

How to test

1. git diff --check
2. git show --check --stat --oneline HEAD
3. Not run locally

Pull Request Checklist

• Reviewed the Contributing Guidelines
  • Especially the Pull-Requests section
• Commits (and commit-messages) are understandable
• Tested with macOS / Linux
• Tested with Windows