Investigate minor snapshots changes after migration to dotviz

Author: IvanGoncharovCreated Dec 6, 2025Updated Dec 6, 2025

The migration in #475 introduces many minor changes. Investigate and confirm that viz.js and dotviz produce the same result for dot files generated by Voyager. All add Voyager specific tests into dotviz project.

Source: APIs-guru/graphql-voyager