GCFT CDN-174: Large-Δ Acoustic Floor Map — v*/c_s → 1.015 at Δ=0.100, Floor Confirmed Across One Decade, σ=16

CDN-174 extends the acoustic floor sweep pre-registered in CDN-173 (Project Aporion, General Coherence Field Theory). σ=16; Δ∈{0.040, 0.060, 0.080, 0.100}; T = 20σ/c_s per block; 20 simulation pairs. Ratios v*/c_s = {1.075, 1.041, 1.025, 1.015} — all below 1.25, monotonically declining toward 1. Combined with CDN-173, the acoustic floor v*(Δ) → c_s(Δ) = √(Δ/(Δ+4)) is confirmed across one decade of Δ (0.006–0.100) and a factor 4 in c_s (0.04–0.16). Residual excess at Δ=0.100 is only 1.5%. Lock code: CDN174_LARGE_DELTA_FLOOR_CONFIRMED_CS_TRACKING_T20TAU_SIGMA16