Query evaluator for `haz` task DAGs. Resolves expressions parsed by
[`haz-query-lang`](https://crates.io/crates/haz-query-lang) against a built
DAG.
Part of the [haz](https://forge.cloudsling.dev/andreu/haz-cli) workspace task
runner. The query semantics are specified in
[`docs/spec/12-queries.md`](https://forge.cloudsling.dev/andreu/haz-cli/src/branch/main/docs/spec/12-queries.md)
in the project repository.
License: AGPL-3.0-or-later. See [`LICENSE.md`](LICENSE.md).