Extreme Blueshift as an Operational Projection - Information Saturation and Observer-Stable Limit

This paper examines extreme blueshift as an operational projection effect arising from information saturation at causal boundaries. Rather than signaling physical divergence, extreme blueshift is shown to reflect observer-stable limits imposed by finite information capacity and signal accessibility. The framework naturally regularizes trans-Planckian behavior in relativistic quantum field theory without invoking new ultraviolet physics, emphasizing operational bounds over microscopic assumptions. Keywords Causality; Strain; Finite Signal Speed; Blueshift; Information Saturation; Quantum Field Theory