Add unit tests for utils

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

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

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

Start by locating the utils code, configuration handling, and existing unit-test conventions; no specific files or test entry points are named. Clarify the expected export behavior, then cover the new enable_export option with its default disabled and verify the config export behavior in tests.

Written by the indexing model from the issue text.