Add configuration options for sorting

**Description**
Currently core lacks proper notifications support.

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

**Priority**: Low/Medium

First reconcile the title, which requests sorting options, with the description, which requests configurable notifications. No file, test, entry point, or completion behavior is named, so clarify the intended scope and locate the relevant configuration and notification areas before implementation. Define sensible defaults and tests once the scope is confirmed.

Written by the indexing model from the issue text.