Add rate limiting for notifications

**Feature request**
It would be great to have pagination for auth.

**Use case**
Many users need this functionality for production deployments.

**Implementation idea**
Add a new config option `enable_pagination` with default `false`.

The title requests notification rate limiting, while the body requests pagination for auth and names an `enable_pagination` configuration option. No files, tests, or entry points are identified; first clarify which behavior is intended, then locate the authentication and notification configuration paths. Done should include a confirmed requirement, documented default behavior, and tests for the selected feature.

Written by the indexing model from the issue text.