docs: def list_jobs(tail):
      """Show info about the existing crawler jobs."""
      query = (
          db.session.query(models.CrawlerJob)
          .order_by(models.CrawlerJob.id.desc())
      )
      if tail != 0:
          query = query.limit(tail)
  
      results = query.yield_per(10).all()
      _show_table(results=results)