Add version to model bin format

tools/utils.py

@@ -16,6 +16,7 @@ def print_cpp_vector(vector, name="expected"):
 def export_model_weights(model: torch.nn.Module, filename):
     with open(filename, 'wb') as f:
 
+        version = 1
         header = ""
         offset = 0
         tensor_data = b""
@@ -33,7 +34,8 @@ def export_model_weights(model: torch.nn.Module, filename):
             tensor_data += tensor_bytes
 
         f.seek(0)
-        f.write(struct.pack('q', len(header)))           
+        f.write(struct.pack('H', version))
+        f.write(struct.pack('Q', len(header)))           
         f.write(header.encode('utf-8'))
         f.write(tensor_data)