* Add missing `policy` attribute to `WebPushSubscriptionSerializer` Fixes #23145 * Add tests
With possible values `all`, `followed`, `follower`, and `none`, control from whom notifications will generate a Web Push alert
- POST /api/v1/push/subscription - PUT /api/v1/push/subscription - DELETE /api/v1/push/subscription - New OAuth scope: "push" (required for the above methods)