Sync PGProcessTrain.batch_size with loader's 32

The previous commit only updated Train.loader.batch_size_per_card; PGProcessTrain
still expected batch_size=14 which would mismatch the dataloader and silently drop samples.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

configs/kr_lp_pgnet.yml

@@ -83,7 +83,7 @@ Train:
           channel_first: False
       - E2ELabelEncodeTrain:
       - PGProcessTrain:
-          batch_size: 14
+          batch_size: 32
           use_resize: True
           use_random_crop: False
           min_crop_size: 24