feat: Pulsar distribution service (Simulator → Pulsar → Brokers)

- Fix Pulsar: use binary client (port 6650) instead of non-existent REST /produce API
- Add pulsar-client to Dockerfile
- Create pulsar/distribution.py: consumes Pulsar and republishes to MQTT (EMQX/Mosquitto), NGSI-LD (Orion/Stellio), FROST
- Add docker-compose.distribution.yml for the distribution service
- Tested: Messages successfully distributed to EMQX and Orion-LD
- Update session resume

docker-compose.distribution.yml

@@ -0,0 +1,30 @@
+# Pulsar Distribution Service — Smart City Digital Twin Martinique
+# Consumes from Pulsar and republishes to MQTT/FIWARE brokers
+# Usage: docker compose -f docker-compose.yml -f docker-compose.distribution.yml up -d
+
+services:
+  pulsar-distribution:
+    build:
+      context: ./pulsar
+      dockerfile: Dockerfile
+    container_name: smart-city-pulsar-distribution
+    networks:
+      - smartcity-shared
+      - traefik-public
+    environment:
+      - PULSAR_HOST=smart-city-pulsar
+      - PULSAR_PORT=6650
+      - EMQX_HOST=emqx_emqx_1
+      - MOSQUITTO_HOST=mosquitto-traefik
+      - ORION_URL=http://fiware-gis-quickstart-orion-1:1026
+      - STELLIO_URL=http://stellio-api-gateway:8080
+      - FROST_URL=http://frost-api-8090:8080/FROST-Server/v1.1
+    restart: unless-stopped
+    labels:
+      - "traefik.enable=false"
+
+networks:
+  traefik-public:
+    external: true
+  smartcity-shared:
+    external: true