Replace all four references to the Claude public artifact URL with the
self-hosted version at eric-turner.com/memex/signal-and-noise.html plus
the offline-capable archive at docs/artifacts/signal-and-noise.html.
The Claude artifact can now be unpublished without breaking any links
in the repo. The self-hosted HTML is deployed to the Hugo site's static
directory and lives alongside the archived copy in this repo — either
can stand on its own.
2a37e33fd6