Fix: Sécurisation CrateDB-Stellio + healthchecks MongoDB/Mosquitto

- Suppression exposition publique ports CrateDB-Stellio (sécurité)
- Ajout service iot-mongodb avec healthcheck fonctionnel (mongo ping)
- Correction healthcheck Mosquitto (port check au lieu de topic)
- Nettoyage container digital-twin-grafana en conflit

docker-compose.iot-agent.yml

@@ -58,7 +58,24 @@ services:
       - IOTA_DEFAULT_RESOURCE=/
       - IOTA_DEFAULT_APIKEY=smartcity-mosquitto
 
-  # Instance 3: BunkerM (Stellio NGSI-LD)
+  # MongoDB for IoT Agents
+  iot-mongodb:
+    image: mongo:4.4
+    container_name: smart-city-iot-mongodb
+    restart: unless-stopped
+    networks:
+      - smartcity-shared
+    ports:
+      - "27017:27017"
+    volumes:
+      - iot-mongodb-data:/data/db
+    healthcheck:
+      test: ["CMD", "mongo", "--eval", "db.adminCommand('ping')"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+  # Instance3: BunkerM (Stellio NGSI-LD)
   iot-agent-bunkerm:
     image: fiware/iotagent-json:latest
     container_name: smart-city-iot-agent-bunkerm
@@ -89,3 +106,8 @@ networks:
     external: true
   traefik-public:
     external: true
+
+volumes:
+  iot-mongodb-data:
+    external: true
+    name: smart-city-digital-twin-martinique_iot-mongodb-data