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

backend/internal/api/routes/routes.go

@@ -419,19 +419,6 @@ func Register(r *gin.Engine, db *gorm.DB, log *zap.Logger, cfg *config.Config, c
 		scripts.POST("/:id/execute", automationHandler.ExecuteScript)
 	}
 
-	playbooks := authorized.Group("/playbooks")
-	{
-		playbooks.GET("", automationHandler.ListPlaybooks)
-		playbooks.POST("", automationHandler.CreatePlaybook)
-		playbooks.GET("/:id", automationHandler.GetPlaybook)
-		playbooks.PUT("/:id", automationHandler.UpdatePlaybook)
-		playbooks.DELETE("/:id", automationHandler.DeletePlaybook)
-		playbooks.POST("/:id/execute", automationHandler.ExecutePlaybook)
-	}
-
-	// 任务执行记录（脚本/定时任务执行历史）
-	authorized.GET("/task-executions", automationHandler.ListExecutions)
-
 	// Ansible 自动化路由 // Logan.Li
 	ansibleHandler := handlers.NewAnsibleHandler(db)
 	ansible := authorized.Group("/ansible")
@@ -457,6 +444,9 @@ func Register(r *gin.Engine, db *gorm.DB, log *zap.Logger, cfg *config.Config, c
 		ansible.GET("/match-hosts", ansibleHandler.MatchHosts)
 	}
 
+	// 任务执行记录（脚本/定时任务执行历史，不含 Ansible）
+	authorized.GET("/task-executions", automationHandler.ListExecutions)
+
 	// 日志监控路由 // Logan.Li
 	logHandler := handlers.NewLogHandler(db)
 	logs := authorized.Group("/logs")