[Card Rules Release #4] [App] Add policy changelog for adding & removing card rules

[JS00001]

Implement this section of the design doc: https://docs.google.com/document/d/1QP2RC7T6M_NmEx5PeJm3wVwXAHKfPfYVm-r4LcrJ95Q/edit?tab=t.0#bookmark=id.a52hidrhe8i7

[melvin-bot]

Triggered auto assignment to Design team member for new feature review - @dannymcclain (NewFeature)

[JS00001]

Havent gotten to this yet

[JS00001]

This is release #4, so moving to weekly