Update an article

true keeps the article unpublished. New articles are drafts unless false is sent; an update that leaves it out keeps the current state.

Optimistic-concurrency token. When provided, the update is applied only if the article's current version still equals this value; otherwise the server rejects the write with 409 (and preserves the rejected content as a 'conflict' version). When omitted, the save falls back to last-write-wins (keeps the existing editor working until it is updated to send the token).

Who can read the article. New articles default to all; an update that leaves it out keeps the current audience.

Deprecated here. Only read by PUT .../articles/{id}/move (which has its own body); ignored on create/update.