## What changes and why

## Checklist
- [ ] `cargo fmt --all` and `cargo clippy --workspace --all-targets` pass without warnings
- [ ] `cargo test --workspace` passes
- [ ] Detection changes carry deterministic evidence and fixed-order reductions
- [ ] Commits follow Conventional Commits in English and code/comments are in English
- [ ] CHANGELOG updated (if there is a user-visible change)
- [ ] Documentation kept in the English/Portuguese pair