Ferra: Campaign yaps and leaderboard

Ferra has upgraded its yapping feature to add support for campaigns and a leaderboard.

Campaign-based yaps are now live. Users can join campaigns, post across social channels, earn yap points, and track their ranking on the leaderboard. The update implements a campaign rewards flow designed to reward social engagement and sustain participation. A direct access link to the feature is provided in the otherlinks field.