Query Folders

Filter folders inside the caller's project.

Follows the general response envelope described in the Query Pattern guide, but does not accept windowing or include_archived — folders are hard-deleted and the response always returns the full filtered set. Filters include id/ids, slug/slugs, kind/kinds, parent_id/parent_ids (use parent_id: null for root folders), path/paths, and prefix/prefixes for subtree lookup.