Power Grid Railway Parallel

Experimental beta of the optional parallel electrical solver companion. Requires Power Grid Railway Experiments Beta 1 for Forge 1.20.1. This JAR retains the internal version 0.1.0-alpha.

Runs only eligible independent networks on worker threads; unsupported networks cause sequential fallback. Performance gains depend on circuit structure and hardware. Automated parallel worker and circuit tests passed; real-world performance and compatibility remain under testing. Back up worlds before use.