Add unit tests for lib

**Description**
Currently lib lacks proper analytics support.

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

**Priority**: Low/Medium

Start by inspecting the lib directory and the existing test layout to find the analytics entry points and current testing conventions. Clarify how analytics should be configured and what the sensible defaults are before adding unit coverage. Done means the behavior is configurable, defaults are defined, and the relevant lib code is tested.

Written by the indexing model from the issue text.