feat: migrate InfluxDB and Grafana from digital-twin/ to smart-city/ stack

- docker-compose.influxdb.yml: InfluxDB v2 on smartcity-shared + traefik-public
- docker-compose.grafana.yml: Grafana 10.2 on smartcity-shared + traefik-public
- grafana/provisioning/: dashboards + datasources updated for smart-city
- pulsar/docker-compose.yml: added smartcity-shared network for simulator access

Services migrated (preserving existing volumes):
  - digital-twin-influxdb → smart-city-influxdb
  - digital-twin-grafana  → smart-city-grafana

Traefik routes updated:
  - influxdb.digitribe.fr → smart-city-influxdb:8086
  - grafana.digitribe.fr  → smart-city-grafana:3000

pulsar/docker-compose.yml

@@ -0,0 +1,43 @@
+# Apache Pulsar Standalone - Smart City Digital Twin Martinique
+# HTTP Admin UI: https://pulsar.digitribe.fr (via Traefik)
+# HTTP API: http://smart-city-pulsar:8080/admin/v2
+# Binary: pulsar://smart-city-pulsar:6650
+services:
+  pulsar:
+    image: apachepulsar/pulsar:3.2.0
+    container_name: smart-city-pulsar
+    restart: unless-stopped
+    user: "10000:0"
+    ports:
+      - "6650:6650"
+      - "8080:8080"
+    environment:
+      PULSAR_MEM: "-Xms512m -Xmx512m -XX:MaxDirectMemorySize=512m"
+      PULSAR_STANDALONE_USE_ZOOKEEPER: "true"
+    volumes:
+      - pulsar-data:/pulsar/data
+    networks:
+      - traefik-public
+      - smartcity-shared
+    command: ["/pulsar/bin/pulsar", "standalone", "-nfw"]
+    healthcheck:
+      test: ["CMD-SHELL", "curl -sf http://localhost:8080/admin/v2/clusters || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 10
+      start_period: 60s
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.pulsar.rule=Host(`pulsar.digitribe.fr`)"
+      - "traefik.http.routers.pulsar.entrypoints=websecure"
+      - "traefik.http.routers.pulsar.tls=true"
+      - "traefik.http.services.pulsar.loadbalancer.server.port=8080"
+
+networks:
+  traefik-public:
+    external: true
+  smartcity-shared:
+    external: true
+
+volumes:
+  pulsar-data: