Constant FEED_SORT_VALUES_DOC 

pub const FEED_SORT_VALUES_DOC: &str = "`date` (newest first, the default), `active` (most recent \
     comment activity first), `random` (uniformly shuffled), and `diverse` \
     (embedding-distance-maximized spread across topics; posts without an \
     embedding yet still appear, just not diversity-optimized). No sort orders \
     by votes: votes are kept, but neither their tallies nor their ranking are \
     shown.";

The four FeedSort values, for get_feed and the dashboard