agentdiff 0.1.16

Audit and trace autonomous AI code contributions in git repositories
## What does this PR do?

<!-- One or two sentences. What changed and why. -->

## Type of change

- [ ] Bug fix
- [ ] New agent support
- [ ] New feature
- [ ] Refactor / cleanup
- [ ] Docs

## Testing

<!-- How did you test this? For agent support, which agent and OS did you verify on? -->

- [ ] `cargo test --locked` passes
- [ ] `python3 -m unittest discover -s scripts/tests -p "test_*.py"` passes
- [ ] Manually tested with a real agent (specify which)

## Checklist

- [ ] Follows existing code style
- [ ] No new dependencies without discussion
- [ ] Updated README / CONTRIBUTING if needed