Improve error messages in middleware

**Description**
Currently store lacks proper filtering support.

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

**Priority**: Low/Medium

The issue names no files, tests, or entry points. Start by locating the middleware and store implementations, then inspect how filtering is currently handled and where configuration defaults are defined. Done means configurable filtering is supported with agreed sensible defaults and coverage for the relevant behavior.

Written by the indexing model from the issue text.