Add TypeScript types for hooks

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

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

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

The issue names no files, tests, or entry points, and its title about TypeScript hook types conflicts with the body’s backup configuration request. First clarify which requirement is intended, then locate the relevant hooks or configuration entry point. Done means the selected request is implemented with the stated default behavior and corresponding coverage or type definitions.

Written by the indexing model from the issue text.