refactor: unify kubernetes_ table prefix, merge CI/CD models, LLM session support

- Rename container_clusters → kubernetes_clusters, container_topology_layouts → kubernetes_topology_layouts
- LLM: add session_id to chat history for multi-turn conversation support
- CI/CD: add pipeline_id, deploy_type, artifact_url, k8s_cluster_id to AppRelease
- Cleanup: remove deprecated playbook handler, simplify automation models
- Database: optimize auto-migrate model list
- Frontend: AIOps assistant improvements, api.ts updates

docker-compose.yml

@@ -3,6 +3,7 @@ services:
   mysql:
     image: mysql:8.0
     container_name: aiops-mysql
+    hostname: aiops-mysql
     restart: unless-stopped
     environment:
       MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD:-CHANGE_ME}
@@ -31,6 +32,7 @@ services:
   redis:
     image: redis:7-alpine
     container_name: aiops-redis
+    hostname: aiops-redis
     restart: unless-stopped
     ports:
       - "6379:6379"
@@ -54,6 +56,7 @@ services:
         VERSION: ${VERSION:-dev}
         BUILD_TIME: ${BUILD_TIME:-unknown}
     container_name: aiops-backend
+    hostname: aiops-backend
     restart: unless-stopped
     ports:
       - "8080:8080"
@@ -79,6 +82,7 @@ services:
       context: ./frontend
       dockerfile: Dockerfile
     container_name: aiops-frontend
+    hostname: aiops-frontend
     restart: unless-stopped
     ports:
       - "80:80"