Eagle eye email digest

[epipav]

Changes proposed ✍️

• Eagle Eye V2 email digest feature.
• New job worker: eagle eye digest ticker: Checks if a digest should be sent every half hour (10:00, 10:30, 11:00 ...)
• We set the nextEmailAt field 5 minutes before the actual email send time so it's caught with each email ticker run. After the run we reset the nextEmailAt using the frequency.
• First 10 search results are included in the email digest
• User permissions updated so that eagle eye is enabled for essential users until 24th of February
• Refactored weeklyAnalyticsEmailsHistory table to RecurringEmailsHistory. We keep track of both weekly analytics and eagle eye email receipts here.

Checklist ✅

• Label appropriately with Feature, Enhancement, or Bug.
• Tests are passing.
• New backend functionality has been unit-tested.
• Environment variables have been updated:
  • Local frontend configuration: frontend/.env.dist.local, frontend/.env.dist.composed.
  • Local backend: backend/.env.dist.local, backend/.env.dist.composed.
  • Configuration docs have been updated.
  • Team members only: update environment variables in override, staging and production env. files and trigger update config script.
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.
• All changes have been tested in a staging site.
• All changes are working locally running crowd.dev's Docker local environment.