Fixes#17898
Since #17204, the admin API has only been available through the web
application because of the unconditional requirement to provide a valid CSRF
token.
This commit changes it back to `null_session`, which should make it work
both with session-based authentication (provided a CSRF token) and with a
bearer token.
* Add trending statuses
* Fix dangling items with stale scores in localized sets
* Various fixes and improvements
- Change approve_all/reject_all to approve_accounts/reject_accounts
- Change Trends::Query methods to not mutate the original query
- Change Trends::Query#skip to offset
- Change follow recommendations to be refreshed in a transaction
* Add tests for trending statuses filtering behaviour
* Fix not applying filtering scope in controller
* Add trending links
* Add overriding specific links trendability
* Add link type to preview cards and only trend articles
Change trends review notifications from being sent every 5 minutes to being sent every 2 hours
Change threshold from 5 unique accounts to 15 unique accounts
* Fix tests
Eugen Rochko
Claire