refactor the store to share code

[cmwylie19]

Describe what should be investigated or refactored

The controller Store has several nested function that are extremely similar, I think we can refactor the store code and reduce a lot of duplicated code.

Links to any relevant code

https://github.com/defenseunicorns/pepr/blob/main/src/lib/controller/store.ts

Additional context

Add any other context or screenshots about the technical debt here.