feat: distribution service + redpanda consumer + updated flow diagram

- Add Pulsar distribution service (consumes smartcity-* → MQTT + context brokers)
- Add Redpanda → InfluxDB consumer (redpanda/consumer.py)
- Update FIXED_LOCATIONS with exact OpenRemote asset coordinates
- Fix Pulsar topics (underscore: smartcity-traffic not smartcity-traffic)
- Fix prometheus.yml endpoints (Redpanda:9644, comment inactive stacks)
- Add docker-compose.redpanda-consumer.yml

docker-compose.redpanda-consumer.yml

@@ -0,0 +1,29 @@
+# Redpanda → InfluxDB Consumer
+# Lit les topics Redpanda et écrit dans InfluxDB pour Grafana
+version: "3.8"
+
+services:
+  redpanda-consumer:
+    image: python:3.11-slim
+    container_name: smart-city-redpanda-consumer
+    restart: unless-stopped
+    command: >
+      sh -c "pip install requests && python3 /app/consumer.py"
+    volumes:
+      - ./redpanda/consumer.py:/app/consumer.py:ro
+    environment:
+      - INFLUX_URL=http://smart-city-influxdb:8086
+      - INFLUX_TOKEN=my-super-admin-token
+      - INFLUX_ORG=digitribe
+      - INFLUX_BUCKET=iot_data
+    networks:
+      - smartcity-shared
+    healthcheck:
+      test: ["CMD", "python3", "-c", "import urllib.request; urllib.request.urlopen('http://smart-city-redpanda:9644/public_metrics')"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+networks:
+  smartcity-shared:
+    external: true