Unpublish Agent

Take the public page offline immediately.

Nulls the slug, which is what every public read filters on, so the page and every receipt derived from it 404 from the next request onward. clone_count survives (those clones still exist and still point here) and so does published_at, so re-publishing does not rewrite history — though it does mint a new slug, because the old URL was withdrawn and handing it back out would resurrect links the owner deliberately broke.

Followers survive too, dormant, and one read does NOT filter them out: GET /api/follows still lists this agent to the people who follow it, by name only, flagged dormant (see routes/follows.py). The brief and the findings stay behind the boundary this endpoint just closed — a follower is told their subscription has gone quiet, not what it used to watch.