Optimize config for large datasets

**Description**
Currently models lacks proper backup support.

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

**Priority**: Low/Medium

No files, tests, or entry points are named. Start by locating the model configuration and any existing storage or persistence paths, then determine how large datasets are handled and where backup settings belong. Done means configurable backup support exists with documented sensible defaults and coverage for the relevant behavior.

Written by the indexing model from the issue text.