Get Linked Stay

A log's stay link, and where resolution stands.

A WRAPPER rather than LinkedStayRead | None, deliberately. A bare null body is indistinguishable from an empty one to the generated client — it handed back {}, which is truthy, so an unlinked call rendered as linked to a stay with undefined dates. An object with an explicit linked_stay: null cannot be misread.

It also carries the status, so "not checked yet" and "looked and found nothing" stay distinguishable without the caller passing it in from somewhere else.