Function user_items_root 

fn user_items_root(caps: &ServerCapabilities, user_id: &str) -> Endpoint

The base for a user-scoped item query.

This is the one place the two route shapes differ, and the reason the route table exists at all. user_scoped_item_routes is true for every generation today — see the flag’s own documentation for why flipping it needs a cited source rather than a guess (DR-282).