Structure Formation After a Finite-Density Bounce: The Growth Factor and σ₈ in the Aldred Frame

In Einstein-Cartan spin-torsion gravity, the Aldred Limit ρ_A = 9.72×10^54 g/cm³ is the density at which the spin-torsion term balances the matter term, and collapse bounces there instead of reaching a singularity. This paper traces the linear growth of structure in a universe that bounced at finite density, at the largest bounce density a companion analysis permits, ρ_b = 2.77×10^54 g/cm³ (DOI 10.5281/zenodo.24102289). At the bounce the effective density is reduced by the fraction ρ_b/ρ_A = 0.285 and the expansion rate by the factor 0.846; the correction then falls as a^-4 and is below 10^-52 at every epoch from nucleosynthesis onward. Integrating the linear growth equation for the growing mode from the bounce scale factor a_b = 1.30×10^-22 to today, with late-time parameters identical to ΛCDM, gives a σ₈ shift of -2.7×10^-8 (fraction -3.3×10^-8): the frame moves S₈ toward the low-redshift values by nothing measurable, and the S₈ tension is neither relieved nor worsened. The deposited computation (compute.py, results.txt, results.json) reproduces every number printed. AI-use disclosure: this work was prepared with the assistance of Dave, an AI research assistant built and directed by the author, who performed the numerical integration and drafting under the author's direction. The author is solely responsible for the content.