Add rate limiting for notifications

**Feature request**
It would be great to have serialization for components.

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

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

The title asks for notification rate limiting, while the body requests component serialization and an enable_serialization option. Start by resolving which behavior is intended, then locate the configuration handling and affected notification or component code. Done should include a defined scope, the default-false option, and tests for the selected behavior.

Written by the indexing model from the issue text.