slower arp and mac polling, more workers

deployment.yml

# the default is hourly
schedule:
  macwalk:
    when: '20 8,14,21 * * *'
  arpwalk:
    when: '50 8,14,21 * * *'

# the default is 50 minutes
jobs_stale_after: '6 hours'

# the default is 2 x number of CPU cores
workers:
  tasks: 'AUTO * 4'