feat: add unified key for easy yearly rotation

[JacobCoffee]

• Adds yearly key prefix that can be changed each year easily instead of having to change the key each year in a bunch of places
• Adds helper abstractions to easily deal with this prefix

[JacobCoffee]

@ewdurbin is this along the right path? if so i can do all the replacements for this.storage.$verb

[ewdurbin]

Huh, I wonder if it could be as simple as updating the way we initialize our storage to change the name to be pyconus2025

https://github.com/ionic-team/ionic-storage?tab=readme-ov-file#angular-configuration

We call the initializer in a few places but it seems like consolidating those would be wise. https://github.com/search?q=repo%3Apsf%2Fpycon-us-mobile+IonicStorageModule.forRoot&type=code

that might ultimately be the cleanest solution.

[JacobCoffee]

#93