Add rate limiting for sorting

**Description**
Currently utils lacks proper encryption support.

**Proposed solution**
Add configurable encryption with sensible defaults.

**Priority**: Low/Medium

First reconcile the title's rate-limiting and sorting request with the body’s encryption request, then locate the mentioned utils component in the repository. Confirm the intended scope, configuration interface, and sensible defaults before starting; done should include the agreed configurable behavior and validation for the relevant request.

Written by the indexing model from the issue text.