Add configuration options for export

**Feature request**
It would be great to have export for handlers.

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

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

Start by locating the handler implementation and the configuration entry point, then trace how export is currently handled. Clarify what exporting handlers should produce and how enable_export should affect that behavior. Done means the option defaults to false and the requested handler export behavior is defined and covered by the relevant checks.

Written by the indexing model from the issue text.