Add unit tests for lib

**Feature request**
It would be great to have search for data.

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

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

Start by inspecting the lib directory and locating how configuration options are defined and tested. The issue does not specify what data sources, search behavior, or user-facing entry point are required, so clarify those requirements before implementation. Done should include a defined search workflow, the enable_search default, and unit tests covering the agreed behavior.

Written by the indexing model from the issue text.