[Fix] Propagate multi_step in Edge.create to Reaction.create to ensure deduplication is working (#405)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#405

epdb/models.py

@@ -2458,6 +2458,8 @@ class Edge(EnviPathModel, AliasMixin, ScenarioMixin, AdditionalInformationMixin)
         rule: Optional[Rule] = None,
         name: Optional[str] = None,
         description: Optional[str] = None,
+        *args,
+        **kwargs,
     ):
         e = Edge()
         e.pathway = pathway
@@ -2487,7 +2489,7 @@ class Edge(EnviPathModel, AliasMixin, ScenarioMixin, AdditionalInformationMixin)
             educts=[n.default_node_label for n in e.start_nodes.all()],
             products=[n.default_node_label for n in e.end_nodes.all()],
             rules=rule,
-            multi_step=False,
+            multi_step=kwargs.get("multi_step", False),
         )
 
         e.edge_label = r