API changes for the "Upcoming activities: Run scripts on online/offline hosts" (#15529) story Changes: - Script endpoints are available in Fleet Free and Fleet Premium - Update `POST /scripts/run` to add a script to the bottom of the upcoming activities - Update `POST /scripts/run/sync` - Add `GET /hosts/:id/activities` to show past activity feed - Add `GET /hosts/:id/activities/upcoming` to show upcoming activity feed - Move docs for `GET /hosts/:id/scripts` to a new "Get host's scripts section" under "Hosts"