This paper presents a novel informational-geometric framework, extending the FS/PS–Ω theory, in which neutrinos are treated as non-dissipative informational probes tracing geodesics on an entropy manifold Ω. We unify temperature, time, and energy as projections of entropy curvature and derive a measurable potential V_\Omega = k_B \nabla^2 \ln \lambda. Using Fisher-information geometry, the model predicts an energy-independent velocity deviation \Delta v_\nu / v_\nu \sim 10^{-11}, distinct from the standard MSW effect (E^{-1} scaling). Three independent verification pathways are proposed — neutrino timing residuals, infrared phase-lag experiments, and local entropy-flux balance. This work completes the theoretical arc of the FSPS–Ω series, bridging poetry, entropy, and measurable physics.