Include Slurm job ID in temporary YAML filenames

src/cal_tools/tools.py

@@ -871,8 +871,9 @@ class CalibrationMetadata(dict):
 
         Avoids a risk of corrupting the main file by writing in parallel.
         """
+        prefix = f"metadata_frag_j{os.environ.get('SLURM_JOB_ID', '')}_"
         with NamedTemporaryFile("w", dir=self._yaml_fn.parent,
-                    prefix='metadata_frag_', suffix='.yml', delete=False) as fd:
+                    prefix=prefix, suffix='.yml', delete=False) as fd:
             yaml.safe_dump(data, fd)
 
     def gather_fragments(self):