Reveal notification in email

[Bradymck]

Description

Users are missing reveal period more often than not. Adding a notification to anything you vote on or challenge should send a reminder to reveal in email. This would help curate content more effectively and ensure people are getting their rewards.

Implementation

Adding reminder to current email notifications and some on site notification would be ideal but for now email is quickest option.

[madvas]

Implemented in District Registry: https://github.com/district0x/district-registry/blob/922ee900f48c1514ab0518295657e0680f05542a/src/district_registry/server/emailer.cljs#L332-L337