Merge branch 'fix/saving_malformed_calibration_metadata_yml' into 'master'

Reset calibration_metadata.yml before saving the initial calibration metadata

See merge request detectors/pycalibration!624

src/cal_tools/tools.py

@@ -789,6 +789,10 @@ class CalibrationMetadata(dict):
             else:
                 print(f"Warning: existing {self._yaml_fn} is malformed, "
                       "will be overwritten")
+        else:
+            # TODO: update after resolving this discussion
+            # https://git.xfel.eu/detectors/pycalibration/-/merge_requests/624
+            self.save()
 
     def save(self):
         with self._yaml_fn.open("w") as fd: