Paper T15B: Strain-Budget Instrumentation for Photon-Like Corridors in HLE v1 RSBU, Tail Loading, and Corridor-Internal Diagnostics

The original T15B proposed wrapped-phase strain-budget diagnostics on the former HLE v1six-neighbor gate. The current T15A instead evolves two signed surface channels and reciprocalcontact fields on an occupied FCC graph. We preserve T15B’s diagnostic question and translateits proposed RSBU, tail, phase-accumulation and axis-participation measurements to gauge-invariant contact quantities. A declared angular reference scales the measurements but does notgate the dynamics. One deterministic four-contact path on the 917-site occupied preparation issampled for two source-phase preparations. At time two, the plus-channel median utilizationis 0.320387 or 0.252094, while the respective maxima are 1.899870 and 1.647894: typical andtail behavior separate even on this short path. These are finite-model diagnostic calculations,not a photon trajectory, a measured coherence limit, a detector event or a complete materialhandoff. The self-contained program and Windows runner reproduce the results from the declaredequations without external data.