Improve error messages in models

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

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

**Priority**: Low/Medium

The issue mentions utils and models but names no files or entry point; first locate the monitoring-related utilities and model error handling in the Shell project, then clarify whether the goal is improved errors or configurable monitoring. Done should mean an agreed scope, sensible defaults, and a reproducible check covering the selected behavior.

Written by the indexing model from the issue text.