Epic: Create Shared State for SDK Local Evaluation / Edge Proxy

### Is your feature request related to a problem?

In order to improve upon certain functionalities related to identity targeting, it would be useful to be able to have a shared state of traits and identities even when using local evaluation mode.

### Describe the solution you'd like.

Needs scoping.

### Describe alternatives you've considered

TBD

### Additional context

_No response_