Добавлены метрики Prometheus и дашборды Grafana (этап 2.5)

Все три Go-сервиса (ingest, device-control, rule-engine) отдают
/metrics в формате Prometheus: счётчики MQTT/RabbitMQ/ClickHouse
операций, гистограммы длительности батч-флашей и диспатча правил,
переходы устройств online/offline. Добавлены сервисы prometheus и
grafana в docker-compose с провижининг конфигом (datasource +
два готовых дашборда: "Ingest & Telemetry" и "Automation & Devices").

docker-compose.yml

@@ -8,6 +8,8 @@ volumes:
   redis-data:
   rabbitmq-data:
   mosquitto-data:
+  prometheus-data:
+  grafana-data:
 
 services:
   mosquitto:
@@ -92,6 +94,8 @@ services:
 
   ingest-service:
     build: ./services/ingest-service
+    ports:
+      - "${INGEST_METRICS_PORT}:9101"
     environment:
       MQTT_HOST: mosquitto
       MQTT_PORT: 1883
@@ -104,6 +108,7 @@ services:
       RABBITMQ_PORT: 5672
       RABBITMQ_USER: ${RABBITMQ_USER}
       RABBITMQ_PASSWORD: ${RABBITMQ_PASSWORD}
+      INGEST_METRICS_PORT: 9101
     depends_on:
       mosquitto:
         condition: service_started
@@ -152,6 +157,8 @@ services:
     build:
       context: .
       dockerfile: services/rule-engine-service/Dockerfile
+    ports:
+      - "${RULE_ENGINE_METRICS_PORT}:9102"
     environment:
       POSTGRES_HOST: postgres
       POSTGRES_PORT: 5432
@@ -165,6 +172,7 @@ services:
       RABBITMQ_USER: ${RABBITMQ_USER}
       RABBITMQ_PASSWORD: ${RABBITMQ_PASSWORD}
       RULE_ENGINE_CACHE_REFRESH_INTERVAL: ${RULE_ENGINE_CACHE_REFRESH_INTERVAL}
+      RULE_ENGINE_METRICS_PORT: 9102
     depends_on:
       postgres:
         condition: service_healthy
@@ -222,5 +230,33 @@ services:
       - home-automation
     restart: unless-stopped
 
+  prometheus:
+    image: prom/prometheus:v3.1.0
+    ports:
+      - "${PROMETHEUS_PORT}:9090"
+    volumes:
+      - ./monitoring/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml:ro
+      - prometheus-data:/prometheus
+    networks:
+      - home-automation
+    restart: unless-stopped
+
+  grafana:
+    image: grafana/grafana:11.4.0
+    ports:
+      - "${GRAFANA_PORT}:3000"
+    environment:
+      GF_SECURITY_ADMIN_USER: ${GRAFANA_ADMIN_USER}
+      GF_SECURITY_ADMIN_PASSWORD: ${GRAFANA_ADMIN_PASSWORD}
+      GF_USERS_ALLOW_SIGN_UP: "false"
+    volumes:
+      - grafana-data:/var/lib/grafana
+      - ./monitoring/grafana/provisioning:/etc/grafana/provisioning:ro
+    depends_on:
+      - prometheus
+    networks:
+      - home-automation
+    restart: unless-stopped
+
   # Remaining app services (health-check-service, esp32-emulator) are added
   # here as they get implemented — see services/*/README.md for the plan.