Withdraw unreferenced media from the cadclaw.io publish set

The build copies docs/media wholesale, so 24 of 26 images shipped to the
public origin without any page linking them: 26.1 MB of a 33.9 MB artifact.

They were not harmless. https://cadclaw.io/media/arb_scoreboard.png was the
page's previous og:image, so every cached social card and crawler index kept
serving the MARB scoreboard from the tool's own domain, which is exactly the
conflation this site was rewritten to stop. The MARB benchmark imagery,
TRL/MRL/IRL chart, and goal renders were all still fetchable after the page
stopped referencing them.

Withdrawn, not deleted: moved to the local git-ignored
_unpublished_media_2026-08-21/. The two images the published surfaces
actually use are kept, and m3crete_radial_spin.gif stays because README.md
renders it on GitHub and PyPI.

Artifact: 40 files / 33.9 MB -> 16 files / 7.2 MB. All 111 internal links
still resolve.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: nick-sunn3dcom

.gitignore

@@ -73,3 +73,6 @@ tmp_v*_transfer/
 /v[0-9]*.jpg
 /v[0-9]*.png
 /v[0-9]*.log
+
+# Media withdrawn from the site 2026-08-21 (kept locally, never served)
+_unpublished_media_*/