Add configuration options for encryption

**Feature request**
It would be great to have notifications for config.

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

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

The title mentions encryption, while the body requests configuration notifications through a new enable_notifications option. Start by locating the repository's configuration handling and notification entry points, then clarify which behavior and deployment paths the option controls. Done should include a defined default of false and coverage for the intended configuration behavior.

Written by the indexing model from the issue text.