Main configuration d=256, L=64: all data, figures and checks re-run

Every OMA reference takes the L/16 combining gain so the comparison
stays resource matched, four hardcoded copies of the configuration are
replaced by MAIN_D or the main curve, and stage_J's K-by-L Gaussian
draw becomes its exact scalar Beta equivalent.

data/pkpa.csv

@@ -1,17 +1,17 @@
 n_frames,perm_frac,eve_ser
-1,0.2545572917,0.9990345
-2,0.7299479167,0.8108416667
-3,0.9266927083,0.4801366667
-4,0.9885416667,0.3021165
-5,0.9955729167,0.2737706667
-6,0.9997395833,0.2587145
-7,1,0.2575458333
-8,1,0.2575538333
-10,1,0.2575
-12,1,0.2576706667
-16,1,0.2577931667
-20,1,0.2578143333
-24,1,0.2574975
-32,1,0.2576283333
-48,1,0.2576288333
-64,1,0.2575123333
+1,0.07789713542,0.9998223333
+2,0.4416992188,0.8047886667
+3,0.8402018229,0.2011701667
+4,0.9570963542,0.078129
+5,0.9874674479,0.058565
+6,0.998828125,0.05340366667
+7,0.9992838542,0.05337483333
+8,0.9998697917,0.05304583333
+10,1,0.05286516667
+12,1,0.05297066667
+16,1,0.0530215
+20,1,0.05311583333
+24,1,0.05297233333
+32,1,0.05296366667
+48,1,0.05290466667
+64,1,0.052919