Workflows Bug Fixes

Allow scheduling of monthly Recurring newsletters after the 28th day
- Added support to allow creation of recurring newsletters that have a monthly schedule after the 28th day (i.e. 29th/30th/31st), where the specified date may not exist every month . In these cases the newsletter will now be scheduled to send on the closest date that month.
Ignore invalid conditions when cloning
- Legacy conditions that are no longer supported are no longer cloned if a campaign is duplicated.
Improvements to segment preparation.
- Added improvements to increase the reliability of segments calculating prior to newsletter schedule times.
Unsubscribe finds by "email" when it can't find by ID
. - Unsubscribe links match users based on their "id" field. Added a fallback to check for users via "email" for email unsubscribes where an "id" does not match.
Add "converted_at" timestamp to "Converted" web hook
. - We added a "converted_at" timestamp field to the Converted web hook event payload.