Add configuration options for notifications

**Problem**
When working with models, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

The issue does not name files, tests, entry points, specific configuration options, or particular model errors. Start by locating model error handling and existing configuration code, then clarify the intended options and message changes; done means the agreed configuration is supported and the resulting errors are more descriptive.

Written by the indexing model from the issue text.