Whenever an editor performs a campaign action (e.g. save, send test email, send campaign), the CMS should log an audit event, and display this log back to the editor.
[x] Create a new model, NewsletterLogEntry, that is similar to Wagtail's PageLogEntry model. We likely don't need all its fields, but at a minimum, we should log the page, the user, the action, the revision, a timestamp, and a textual description of the action (the label field).
Whenever an editor performs a campaign action (e.g. save, send test email, send campaign), the CMS should log an audit event, and display this log back to the editor.
NewsletterLogEntry, that is similar to Wagtail'sPageLogEntrymodel. We likely don't need all its fields, but at a minimum, we should log the page, the user, the action, the revision, a timestamp, and a textual description of the action (thelabelfield).wagtail.models.BaseLogEntry(review code; ask on Slack).The log entry actions should roughly map to campaign backend methods: