Portable createEntityAdapter regression traces

[PerchAnton]

I built an external adapter and replay example for small, shareable regression traces. Three scenarios exercise redux Toolkit 2.13.0 createEntityAdapter reducers inside configureStore: sorted-ID reordering, duplicate IDs, missing updates/removals and immutable initial state. All 13 steps pass.

This packages fixed action sequences and expected state as JSON. React, RTK Query and async middleware are outside its scope.

I maintain the experimental interaction-check runner. The example uses pinned stable packages, stays outside the project and adds no runtime dependency. Feedback on whether this helps share small reproducers is welcome.