Add healthcheck to dsms-gateway

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.coolify.yml

@@ -217,6 +217,12 @@ services:
     depends_on:
       dsms-node:
         condition: service_healthy
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://127.0.0.1:8082/health"]
+      interval: 30s
+      timeout: 10s
+      start_period: 15s
+      retries: 3
     restart: unless-stopped
     networks:
       - breakpilot-network