[Fix] Update Node depth when adding new Edges to a Pathway (#384)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#384

epdb/legacy_api.py

@@ -1967,6 +1967,9 @@ def add_pathway_edge(request, package_uuid, pathway_uuid, e: Form[CreateEdge]):
             description=e.edgeReason,
         )
 
+        # Update depths as sideeffect of above operation
+        pw.update_depths()
+
         return redirect(new_e.url)
     except ValueError:
         return 403, {"message": "Adding Edge failed!"}