On the Information-Thermodynamic Bounds of the Dyson Stealth Grid: Substrate Optimization and Cloaking Conditions at the Cosmic Microwave Background Floor

Traditional searches for megastructures rely on detecting mid-infrared thermal signatures re-radiated by macroscopic solid shells. Recent empirical bounds place strict upper limits on the prevalence of such conventional ~300 K partial Dyson structures within the local galaxy. The Penrose-Fermi-Landauer Loop Hypothesis resolves this observational absence by introducing the Dyson Stealth Grid (DSG), a fluid computational substrate operating at the absolute limits of information thermodynamics. By utilizing reversible, non-erasing data computing architectures and establishing an operational equilibrium at the Cosmic Microwave Background (CMB) thermal floor (\(T \approx 2.725\) K), advanced civilizations systematically bypass infrared detection filters. This paper formalizes the core mathematical frameworks governing the DSG, demonstrating that the structural emission profile converges identically with the local blackbody radiation background, resulting in a zero-contrast cosmic profile (\(\Delta I \equiv 0\)).