chore(submodule): bump pumpingStation ef07f2a -> 2fb083d

Promotes the pumpingStation development tip into the superproject. On top of the
ef07f2a already pinned by the 5-node bump, this adds the contract/docs work:
- docs(contract): close output-contract gaps — mode/manualDemand, Port-2 topic,
  output manifest (4889fda)
- docs(contract): worked msg examples for every input topic + output port (2fb083d)
- fix(ps): persist stopLevel/holdLevel as numbers; flow output in m³/h; etc.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -67,10 +67,7 @@ services:
   # Grafana — dashboard visualization
   # ---------------------------------------------------------
   grafana:
-    # Pinned per dashboardAPI v2 PRD: legacy POST /api/dashboards/db is the
-    # generator target; Grafana 12 K8s-style API is out of scope. Bump
-    # deliberately, not via `pull --latest`.
-    image: grafana/grafana:11.3.0
+    image: grafana/grafana:latest
     container_name: evolv-grafana
     restart: unless-stopped
     ports: