Delete Folder

Delete a folder, including all documents and subfolders inside it.

Chat-platform content is not accessible from this endpoint: chat folders 404 as targets and chat content nested inside the subtree survives the cascade. A partial delete fails with 409 on a state conflict (documents still queued or processing, or chat-platform content inside) and 500 when a server error interrupted the cascade; both bodies carry the counts of what was already deleted and what survived.