Draft: Outgoing COAR Notifications

Quick prototype for https://hedgedoc.softwareheritage.org/u4SE5rAKTGWmabO75tKHUg (https://gitlab.softwareheritage.org/product-management/core-platform/-/issues/3)

• use https://github.com/antleaf/coar_notify_inbox to receive notifications
• write 4 patterns
  • Accept (passed checks)
  • Reject (not passed checks)
  • IngestAction (loaded)
  • Failed (not loaded)
• DepositNotification model to keep track of notifications (?)
• use Deposit.__init__ to store previous state
• use Deposit.save() to send notifications

Local COAR Inbox service to receive notifications

  # in compose.deposit.yml
  coar-notity-inbox:
    image: antleaf/notify_ldn_inbox:1.2
    command: notify_ldn_inbox -host=http://localhost -port=30800 -debug=true
    ports:
      - "30800:30800"