indexing: periodly crawl sitemap and then update documents & knowledge graph

[sykp241095]

daily

[chethanuk]

Will be useful feature - We can use https://taskiq-python.github.io/guide/scheduling-tasks.html#dynamic-scheduling

cron schedules instead, just use schedule_by_cron method.

    await my_task.schedule_by_cron(
        redis_source,
        "*/5 * * * *",
        11,
        arg2="arg2",
    )