nx_interp_gate.nx

nx_interp_gate.nx -- proves + MEASURES the sovereign snapshot interpolation buffer (nx_interp): under packet LOSS + REORDERING, render-in-the-past interpolation reconstructs the peer's true path (loss becomes invisible) while naive snap-to-latest (zero-order hold) staircases. This is what keeps the bad-mobile-network player smooth. 1) reorder-safe + correct: out-of-order pushes -> time-sorted history; interp ~= truth (loss invisible) 2) EXCEED vs naive (neg-control = zero-order hold): interp max error << naive max error (measured) 3) SMOOTHNESS: interp max per-step jump < naive max per-step jump (measured) 4) yaw shortest-arc: 350deg -> 10deg interpolates through 0 (not the long way) 5) no-data (neg): empty history -> sample returns 0 (no fabricated pose) 6) clamp: before-first -> status 2, at/after-last -> status 3 (hold; extrapolate = NET-R2) Built nx_cc_sovereign -> nxasm_x86 (no gcc, no .sh). license_tier: ORIGINAL