fix: evaluate.job

Author: chungongyu

examples/evaluate.job

@@ -102,7 +102,6 @@ ${runner} ${PWD}/main.py ${node_opts} evaluate \
     \
     --num_workers=1 \
     --batch_size=1 \
-    --prefetch_factor=4 \
     \
     ${eval_opts} \
     $*

profold2/command/evaluator.py

@@ -258,8 +258,8 @@ def add_arguments(parser):  # pylint: disable=redefined-outer-name
   parser.add_argument(
       '--crop_algorithm',
       type=str,
-      default='random',
-      choices=['random', 'domain', 'knn'],
+      default='auto',
+      choices=['auto', 'random', 'knn'],
       help='type of crop algorithm.'
   )
   parser.add_argument(