Add paired confidence intervals (E2), fixed-beta validation curve (E5), and mask-realization check

data/e2_paired.csv

@@ -0,0 +1,7 @@
+snr,ser_spec,ser_adapt,mean_diff,se_diff
+0,1.0,1.0,0.0,0.0
+4,0.999875,0.9999375,-6.25e-05,6.250000000000001e-05
+8,0.99425,0.99675,-0.0025,0.0004415133728197241
+12,0.8074375,0.823875,-0.0164375,0.001822954877359744
+16,0.2864375,0.278125,0.0083125,0.001970442288335313
+20,0.033125,0.0274375,0.0056875,0.0008671398487004276

data/e5_valcurve.csv

@@ -0,0 +1,31 @@
+step,val_loss
+100,0.47339609265327454
+200,0.4509868323802948
+300,0.43674764037132263
+400,0.4313800036907196
+500,0.4262669086456299
+600,0.4236183166503906
+700,0.4218555688858032
+800,0.4200989902019501
+900,0.41954243183135986
+1000,0.4185897707939148
+1100,0.41777464747428894
+1200,0.41801124811172485
+1300,0.4173048734664917
+1400,0.41738399863243103
+1500,0.4171726703643799
+1600,0.417477011680603
+1700,0.41742151975631714
+1800,0.4169759750366211
+1900,0.41719603538513184
+2000,0.4168195426464081
+2100,0.4161660969257355
+2200,0.41649919748306274
+2300,0.41610589623451233
+2400,0.416185587644577
+2500,0.4159914553165436
+2600,0.416018009185791
+2700,0.4158671498298645
+2800,0.4158063232898712
+2900,0.4162437915802002
+3000,0.41600432991981506