FEATURE: multiple use invite links (#9813)

lib/badge_queries.rb

@@ -158,7 +158,8 @@ module BadgeQueries
       WHERE u.id IN (
         SELECT invited_by_id
         FROM invites i
-        JOIN users u2 ON u2.id = i.user_id
+        JOIN invited_users iu ON iu.invite_id = i.id
+        JOIN users u2 ON u2.id = iu.user_id
         WHERE i.deleted_at IS NULL AND u2.active AND u2.trust_level >= #{trust_level.to_i} AND u2.silenced_till IS NULL
         GROUP BY invited_by_id
         HAVING COUNT(*) >= #{count.to_i}