pytest-rng: Reproducible Randomness for Pytest Tests

pytest-rng is a pytest plugin that provides fixtures to manage and inject reproducible randomness into your tests. It offers a `random.Random` instance (`rng`), a factory to create new instances (`rng_factory`), and access to the current seed (`rng_seed`). Version `1.0.0` is current, and it maintains a stable release cadence for a core pytest plugin, focusing on test stability.