Ab Initio Resolution of the Hubble Tension: Visco-Elastic Cosmology and Conformal Degeneracy in the KEFE Framework

We present a mechanistic resolution to the cosmological Hubble (H0) Tension using the continuum mechanics of the Kinemetric-Extended Field Equations (KEFE). By shifting the physical ontology of the vacuum from a passive geometric background to a causal, relativistic elastoviscoplastic fluid governed by Müller-Israel-Stewart (MIS) hydrodynamics, we demonstrate that standard ΛCDM expansion models critically omit the macroscopic thermodynamic drag of the early universe. Within this framework, we analytically derive the present-day local expansion rate (H0,local≈73.54 km/s/Mpc) strictly ab initio and parameter-free. By modeling elementary particles as topological solitons, this expansion rate is natively derived from the holographic boundary conditions of the bare electron mass and fundamental quantum constants, offering a continuum-mechanical basis for the Dirac-Eddington-Zeldovich scaling relations. We demonstrate that the 5σ discrepancy with early-universe measurements is not an empirical crisis, but a deterministic Projection Artifact. During the primordial epoch, continuous scattering within the dense, opaque plasma generated a macroscopic visco-elastic drag upon the spatial manifold, formalized as Thermal-Inertial Feedback (TIF). This extreme primordial viscosity physically choked the initial expansion, preventing the infinite-velocity singularity of a frictionless "Big Bang." The standard CMB inference of 67.4 km/s/Mpc is mathematically revealed as the exact geometric consequence of fitting this heavily damped, visco-elastic early universe to a frictionless, constant-viscosity idealization. Finally, we resolve the primary cosmological objection to an extended, decelerated primordial timeline: the preservation of early-universe observables. Because fundamental topological masses and the weak interaction decay rate scale synchronously with the softening visco-elastic spatial manifold, we prove that the Baryon Acoustic Oscillation (BAO) sound horizon, Silk damping and Big Bang Nucleosynthesis (BBN) elemental yields are strictly protected. Through the mathematical principle of Conformal Topological Degeneracy, empirical constraints are natively preserved without requiring the introduction of ad hoc dark sectors or Early Dark Energy (EDE) parameters. Key Contributions: Ab Initio Derivation of H0: Derives the un-damped local expansion rate of 73.54 km/s/Mpc directly from the geometric phase-space embedding of the bare electron mass. Thermal-Inertial Feedback (TIF): Identifies the 67.4 km/s/Mpc CMB measurement as a methodological projection artifact caused by ignoring the macroscopic visco-elastic drag of the primordial plasma. Conformal Topological Degeneracy: Proves that synchronous scaling of the spatial manifold and local topological masses perfectly preserves dimensionless early-universe observables, protecting BBN and CMB power spectra. Singularity Avoidance: Demonstrates that vacuum viscosity natively prevents the infinite-velocity singularity of the classical Big Bang, enforcing an over-damped, sub-luminal early expansion. The KEFE Framework Suite:This manuscript is part of a comprehensive suite of papers demonstrating the universal application of the Kinemetric-Extended Field Equations (KEFE). By modeling the quantum vacuum as a causal, elastoviscoplastic continuum, the framework resolves major crises across disparate scales without dark sectors: Foundations: The Kinemetric-Extended Field Equations (KEFE): A Unified Effective Field Theory of Vacuum Rheology and Cosmological Evolution, https://doi.org/10.5281/zenodo.19333013 Cosmology: Ab Initio Resolution of the Hubble Tension: Visco-Elastic Cosmology and Conformal Degeneracy, https://doi.org/10.5281/zenodo.20254714 Galactic Astrophysics: Ab Initio Derivation of MOND and Dark Matter Profiles: Causal Decoherence and Visco-Elastic Wakes, https://doi.org/10.5281/zenodo.20254928 Quantum Gravity: Ab Initio Resolution of the Black Hole Information Paradox: Asymptotic Mass Freedom and Visco-Elastic Sublimation , https://doi.org/10.5281/zenodo.20254954