Merge pull request #260 from scipp/add-nx-crystal-class

[Essreduce] Add NXcrystal class provider to workflow

Author: jl-wynen

packages/essreduce/src/ess/reduce/nexus/workflow.py

@@ -674,6 +674,7 @@ def load_source_metadata_from_nexus(
     load_nexus_component,
     load_all_nexus_components,
     data_by_name,
+    nx_class_for_crystal,
     nx_class_for_detector,
     nx_class_for_monitor,
     nx_class_for_source,