Fixed review comments

cas_wrapper.py

@@ -84,6 +84,15 @@ class CasWrapper:
             local_path: str,
             metadata: typing.Dict = None,
     ) -> typing.Tuple[bool, str]:
+        """
+        Wrapper for avoiding raising exceptions during notarization.
+        Return `success` flag instead for library user to react respectively.
+        :param local_path: path to a local Git repo
+        :param metadata: additional metadata
+        :return: boolean flag for operation success and the hash
+            of the notarized artifact.
+        :rtype: tuple
+        """
         success = False
         try:
             cas_hash = self.notarize(local_path, metadata=metadata)