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.

[samayer12]

Test coverage of store.ts is pretty low, I'll want to shore that up before I can confidently refactor. Here's a snippet from npm run test:unit:

File                  | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s
  store.ts            |   16.21 |    12.82 |   17.39 |   16.55 | 19-300

[samayer12]

After working on this for a bit, it seems like natural spots to refactor are:

• Code Coverage in store.ts
• Shared-ish caching logic for two different caches handled by the store
• Consolidating redaction logic to the logger, which is used by the store

[samayer12]

#1259 addresses this issue. In general, we introduced the concept of a storeCache for cache operations.

Two outstanding items for future work:

• Ensure meaningful test coverage of store.ts, which only exposes a constructor
• Extract migration logic from store.ts to storeCache.ts