We need a list of functions with an associated string, keyed by a sequential int. Neither can change between program versions. In fact, any changes align perfectly to program versions.

The datastructure: a list of string and func with statically known parameters

The solution my PO insists on: a class with static methods that have an attribute for specifying the number, and a database table of number to string. Whenever you need to pass around the list, you pass around a Type object of the class.