fix: Stabilisation complète Smart City Digital Twin Martinique

- Correction simulateur: nettoyage code FIWARE (erreurs syntaxe)
- Grafana: dashboard complet 10 panneaux sur grafana.digitribe.fr
- InfluxDB: datasource corrigée (bucket smartcity, org digitribe)
- Nettoyage: suppression services FIWARE (Orion-LD, Stellio, QuantumLeap)
- Pipeline validé: Simulator → 3 MQTT brokers → Telegraf → InfluxDB → Grafana
- Dashboard URL: https://grafana.digitribe.fr/d/smartcity-martinique-complete/

Architecture simplifiée:
- 3 MQTT brokers (EMQX, Mosquitto, BunkerM)
- Telegraf pour agrégation
- InfluxDB pour stockage time-series
- Grafana pour visualisation (Traefik: grafana.digitribe.fr)

import_complete.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+import json
+import requests
+
+# Read the complete dashboard
+with open('/home/eric/smart-city-digital-twin-martinique/grafana-dashboard-complete.json', 'r') as f:
+    dashboard = json.load(f)
+
+# Import to Grafana
+url = "https://grafana.digitribe.fr/api/dashboards/db"
+auth = ('admin', 'Digitribe972')
+
+payload = {
+    "dashboard": dashboard,
+    "overwrite": True
+}
+
+try:
+    resp = requests.post(url, json=payload, auth=auth, verify=False)
+    print(f"Status: {resp.status_code}")
+    print(resp.json())
+except Exception as e:
+    print(f"Error: {e}")