Publish or unpublish the site's stats

Owner or admin only. enabled must be sent explicitly — this is the one setting that changes who can SEE the data, so an absent field must not read as "turn it off".

A hobby site on a free account is always public and answers 409 hobby_always_public to enabled: false. Its stats are the widget it ships, and the hash that addresses them is already in the page's markup; enabled: true on one succeeds as a no-op. An owner with a paid subscription (active, or past_due during a retried renewal) may turn it off.