with table django_q_task, how to periodically auto-delete old data record

[flyly0755]

I use database as broker, so with table django_q_task to store task info.
But after some times, get so many data record, and how to periodically auto-delete old data record?
how to config?
with table django_q_task, i also have some doubt,
CREATE TABLE "public"."django_q_task" (
"name" varchar(100) COLLATE "pg_catalog"."default" NOT NULL,
"func" varchar(256) COLLATE "pg_catalog"."default" NOT NULL,
"hook" varchar(256) COLLATE "pg_catalog"."default",
"args" text COLLATE "pg_catalog"."default",
"kwargs" text COLLATE "pg_catalog"."default",
"result" text COLLATE "pg_catalog"."default",
"started" timestamptz(6) NOT NULL,
"stopped" timestamptz(6) NOT NULL,
"success" bool NOT NULL,
"id" varchar(32) COLLATE "pg_catalog"."default" NOT NULL,
"group" varchar(100) COLLATE "pg_catalog"."default",
"attempt_count" int4 NOT NULL,
CONSTRAINT "django_q_task_pkey" PRIMARY KEY ("id")
how to understand field hook, result, success(with my table result, i got success value 't', what is this t means or; and result Null),
is there any doc told how to use these fields?