P4: decode FUN_180529fe0 mono-path exactly + extract live mask tables

Full decomp of the per-band mask-apply loop (scale -> IIR1/2/3 leaky ->
blend -> exp2 bigkernel -> combine/accumulate -> dual warp -> dry/wet -> FFT-conv).
Extracted runtime tables to rt_mask_tables.{hpp,cpp}: IIR A1/B1,A2/B2,A3/B3
(leaky y=A*acc+B*x, B=1-A), warp 0x5406a8, per-band 0x540768, PRNG LUT 0x5408b0.
bigkernel 0x26b820 = vectorized exp2 (log2e/floor/mantissa tables). Fixed the
broken warp line in framed_model.cpp (compiles again).

dsp/framed_model.hpp

@@ -8,6 +8,13 @@ struct DetectorBand {
     float q;     // resonance Q
     float sens;  // XML sens (dB); internal sens_stored = sens * 2.054
     float level_scale = 1.0f;  // calibration: level = am * res * level_scale
+    // Per-band mask LUT: gain = (1/(1+K*acc))^n  (live-fit defaults band0).
+    float lut_k = 9.8026f;
+    float lut_n = 0.25966f;
+    // Dry/wet depth (XML "depth", 0.864 in reference renders). Applied only when
+    // set >= 0; default -1 keeps the live LUT fit intact (fit already absorbed
+    // band0's dry/wet blend).
+    float depth = -1.0f;
 };
 
 // FramedDetector — C++ port of the real soothe mask chain (FUN_180529fe0).