Fix pyvis hierarchical graph render error

dataset_bundle/public_release_manifest.json

@@ -1,7 +1,7 @@
 {
   "public_version": "congress-public-records-slice-2026-04-v1",
   "title": "Congress Public Records Slice",
-  "release_date": "2026-04-19T08:23:16-04:00",
+  "release_date": "2026-04-19T11:10:25-04:00",
   "slice_description": "A neutral, review-oriented slice of House public-record linkages across financial disclosures, sector overlap, and community project funding recipient relationships.",
   "source_run_name": "house_all_baseline_20260418_v21_recipienthardening",
   "dataset_repo_id": "cjc0013/cmp-data",

public_space_app.py

@@ -354,7 +354,10 @@ def _render_graph(nodes: pd.DataFrame, edges: pd.DataFrame) -> str:
     network.set_options("""
     var options = {
       "interaction": {"hover": true, "tooltipDelay": 120, "navigationButtons": true, "keyboard": true},
-      "physics": false,
+      "physics": {
+        "enabled": false,
+        "stabilization": {"enabled": false}
+      },
       "layout": {
         "hierarchical": {
           "enabled": true,