Add rate limiting for import

**Feature request**
It would be great to have compression for controllers.

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

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

The title requests rate limiting for import, while the body requests controller compression, so first read the issue thread and repository configuration and controller entry points to resolve the scope. No files or tests are named; done should include an agreed compression behavior and the `enable_compression` option defaulting to `false`, with coverage for the selected behavior.

Written by the indexing model from the issue text.