[Fix] Legacy API Node Depth Parsing, description validation in Reaction.create (#402)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#402

epdb/legacy_api.py

@@ -1891,7 +1891,7 @@ def add_pathway_node(request, package_uuid, pathway_uuid, n: Form[CreateNode]):
         pw = Pathway.objects.get(package=p, uuid=pathway_uuid)
 
         if n.nodeDepth is not None and n.nodeDepth.strip() != "":
-            node_depth = int(n.nodeDepth)
+            node_depth = int(float(n.nodeDepth))
         else:
             node_depth = -1