GraphCal-Judge R2 Reproducibility Artifact

Credential-free reproducibility artifact for the GraphCal-Judge R2 revision. This dataset contains the verified Supplementary Artifact S2 archive, including analysis code, configurations and prompts, validation material, and machine-readable result tables. It excludes original licensed datasets, private provider configurations, raw provider responses, and API credentials. The archive includes README_S2.md and a manifest for integrity verification. The corresponding frozen GitHub Release is available at: https://github.com/niyaobuyaochibl/graphcal-judge-r2-artifact/releases/tag/v1.0.0-r2