//! Python runtime bridge for invoking r2x plugins.
//!
//! This crate initializes PyO3 from r2x-cli's configured virtual environment,
//! resolves `PYTHONHOME` and `site-packages`, loads plugin packages, and invokes
//! plugin entry points with serialized arguments and artifacts.
//!
//! Plugin discovery is delegated to `r2x-ast`; this crate owns runtime
//! execution and Python-side logging configuration.