Improve store performance

**Description**
Currently middleware lacks proper export support.

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

**Priority**: Low/Medium

Start by locating the middleware and the store/export path in the repository, then read the existing configuration and any related tests. Clarify which store is affected, what export target is required, and which defaults are expected before making a change; done means configurable export works with documented sensible defaults and the relevant tests pass.

Written by the indexing model from the issue text.