refactor(log): remove legacy log deletion endpoint and associated types

router/api-router.go

@@ -304,6 +304,8 @@ func SetApiRouter(router *gin.Engine) {
 		}
 		logRoute := apiRouter.Group("/log")
 		logRoute.GET("/", middleware.AdminAuth(), controller.GetAllLogs)
+		// Legacy synchronous direct-delete route used only by the classic frontend.
+		// TODO: remove once the classic frontend is removed; the default frontend uses /system-task/log-cleanup.
 		logRoute.DELETE("/", middleware.RootAuth(), controller.DeleteHistoryLogs)
 		logRoute.GET("/stat", middleware.AdminAuth(), controller.GetLogsStat)
 		logRoute.GET("/self/stat", middleware.UserAuth(), controller.GetLogsSelfStat)