fix: Simulateur MQTT 3/4 + OpenRemote master + Mapsettings

- MQTT OK: 3/4 (EMQX, Mosquitto, BunkerM)
- OpenRemote: utilise realm master (token fonctionnel)
- Realm smartcity recréé dans Keycloak
- Assets IOTSensor créés dans master (30) et smartcity (30)
- Mapsettings: layers iot-sensors + labels pour master et smartcity
- INTERVAL=5s, réseau openremote_default ajouté
- Dockerfile: --no-cache rebuild

docker-compose.quantumleap.yml

@@ -25,7 +25,7 @@ services:
     ports:
       - "4200:4200"
     healthcheck:
-      test: ["CMD", "curl", "-f", "-X", "POST", "-d", "{\"stmt\": \"SELECT 1\"}", "http://localhost:4200/_sql"]
+      test: ["CMD-SHELL", "curl -s -f http://localhost:4200/ > /dev/null || exit 1"]
       interval: 10s
       timeout: 5s
       retries: 5