Function create_service_human 

pub fn create_service_human(
    form: Form<AddServiceForm>,
    session: Option<AdminSession>,
    pool: &State<DbPool>,
    database_url: &State<DatabaseUrl>,
) -> Result<Redirect, Template>

Defines a new service and activates it on each checked corpus — one background activation job per corpus (each creates a TODO task per imported document, so a large corpus can run for a while; the operator tracks them on /jobs). Gated by the signed-in AdminSession cookie (anonymous → sign-in). Redirects to /jobs when any corpus was selected (so the in-flight registrations are immediately visible), else back to /services. 409 if the name already exists.