StoreProperties
A named store instance (wow.stores.<name>): its type, memory, postgres, mongo or a community backend's (the type of its store provider), how it manages the framework's schema (ddl) and how its queries run (query). Every other key of the store is a setting its provider declares, at the same level (wow.stores.<name>.data-source, wow.stores.<name>.client): the host reserves RESERVED alone, and a key no provider of the store's type declares fails the start, naming the ones it does. Two stores of one type may serve different databases; two log stores may not share one.