Spin-Control Connectivity Graph analysis: Ni2/coronene retained-state benchmark

Analysis code, parsed electronic-structure manifolds, compact matrix-reconstruction inputs, descriptor sweeps, sensitivity records, and figures for a fixed-geometry Ni2/coronene retained-state benchmark. The release documents state-set sensitivity in one computational construction; it does not establish retained-state convergence, molecular-candidate ranking performance, or predictive control fidelity. Numerical data and figures are licensed under CC BY 4.0. Analysis code is licensed separately under MIT; see LICENSES and the README for scope.