Improve handlers performance

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

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

**Priority**: Low/Medium

Locate the route handlers and the existing configuration and notification entry points. Determine which routes need notifications and how configurable defaults should behave; done means the intended routes support notifications with sensible defaults and existing handler behavior remains intact.

Written by the indexing model from the issue text.