fix: minor change for pylint

capella2polarion/data_models.py

@@ -54,6 +54,7 @@ def calculate_checksum(self) -> str:
         data = dict(sorted(data.items()))
 
         converted = json.dumps(data).encode("utf8")
+        # pylint: disable-next=attribute-defined-outside-init
         self._checksum = json.dumps(
             {"__C2P__WORK_ITEM": hashlib.sha256(converted).hexdigest()}
             | dict(sorted(attachment_checksums.items()))