Empirical Tests of $A_2$ Geometry in Turbulent Cascade Dynamics

Tests vortex-skeleton and junction-birth signatures motivated by Paper 9 using DNS turbulence data and a ladder of null models. The temporal junction-birth enrichment signal survives a time-coherent frozen-phase spectral null, shows strong location specificity under a shifted-mask null, and exhibits a forward/backward temporal asymmetry. Robustness is checked across a parameter grid and against targeted segmentation hygiene variations. Analysis scripts and aggregate outputs are available on request.For a series overview, reading order, and claim‑hygiene guide, see Coherent Gravity Theory (CGT): An Onboarding Primer: https://doi.org/10.5281/zenodo.18212967