Pumping-station demo overhaul + cross-node test harness + bumps

Submodule bumps land the deadlock fix (state.js residue unpark + MGC
optimalControl dispatch reorder) and pumpingStation stopLevel hysteresis.

- Renames examples/pumpingstation-3pumps-dashboard →
  pumpingstation-complete-example with regenerated flow.json. New
  dashboard groups, demand-broadcast wiring, S88 placement rule
  applied, ui-chart trend-split and link-channel naming follow
  .claude/rules/node-red-flow-layout.md.
- New cross-node test harness under test/: end-to-end-pumpingstation
  drives PS + MGC + 3 pumps + physics simulator end-to-end and
  verifies the ~5/15 min cycle.
- Adds Grafana provisioning dashboards (pumping-station.json) and a
  helper sync-example.sh script for export/import to live Node-RED.
- Docker entrypoint + settings + compose tweaks for the persistent
  user dir layout used by the demo.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docker/grafana/provisioning/dashboards/dashboards.yaml

@@ -0,0 +1,14 @@
+apiVersion: 1
+
+providers:
+  - name: EVOLV
+    orgId: 1
+    folder: EVOLV
+    type: file
+    disableDeletion: false
+    editable: true
+    updateIntervalSeconds: 10
+    allowUiUpdates: true
+    options:
+      path: /etc/grafana/provisioning/dashboards
+      foldersFromFilesStructure: false