fix: ensure cache-handler works as expected

[runspired]

• Adds additional testing for the CacheHandler. resolves [Store] Documentation should tell something about store lifetimes #8510
• Ensures cacheOptions.key is used before url (needs test). resolves [Store / Cache] The key from cacheOptions is not used #8516
• resolves [Store] recordArrayManager._keyedArrays is undefined #8515 by ensuring keyedArrays is setup properly (needs test)

[Jopie01]

Thanks 🎉 ! I upgraded to alpha.15 and I'm able to drop the constructor from both the store and application route. No need to set store.lifetimes and the store is now using the general requestManager through a service.

Take a look at my demo repo to see the differences.