Observed Rotational Residuals as Evidence for an Energetic Spacetime Medium

This short paper presents observational and phenomenological evidence supporting the idea that spacetime behaves as an active energetic medium activated through rotation. Several residual anomalies and rotational deviations—often treated as secondary corrections—are reinterpreted here as direct signatures of rotational spacetime activation. The paper does not introduce new mathematics, but instead consolidates existing observations into a unified explanatory framework, preparing the ground for a forthcoming full dynamical and Lagrangian formulation.