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-compose.yml

@@ -16,6 +16,10 @@ services:
       - .:/data/evolv:cached
       # Named volume: overlay node_modules so host doesn't need native deps
       - evolv_node_modules:/data/evolv/node_modules
+      # Persistent Node-RED user dir: flows/projects/sessions survive
+      # container recreation. Without this, `docker compose down && up`
+      # wipes the active flow and the entrypoint reseeds demo-flow.json.
+      - nodered_data:/data
     environment:
       - TZ=Europe/Amsterdam
       - LOCATION_ID=docker-dev
@@ -83,6 +87,8 @@ services:
 volumes:
   evolv_node_modules:
     driver: local
+  nodered_data:
+    driver: local
   influxdb_data:
     driver: local
   grafana_data: