test the inference decode

zero the crf transitions so the expected path is just the argmax

Author: Kaushik-Kumar-CEG

etc/scripts/dataset_pipeline/test_train_model.py

@@ -1,8 +1,12 @@
 # tests for train_model.py and export_onnx.py
 # these cover the pure logic, the heavy model parts are exercised on a gpu
+import os
 import sys
 from pathlib import Path
 
+# transformers goes looking for keras and dies on keras 3
+os.environ.setdefault('USE_TF', '0')
+
 sys.path.insert(0, str(Path(__file__).parent))
 from train_model import align_labels
 from train_model import decode_row