disk: a minted scratch Zuse pair, for v4 work with Zuse attached

disk/zuse-scratch/artemis.img and zuse-thumb-ident.img, minted from blank
by a system=v3 amd64 boot (genesis minted) and confirmed by a second
(identity confirmed); both logs included. The genesis marker is on the
Artemis disk, so the two are a pair. The committed artemis.img and
thumbdrives/zuse-thumb-ident.img are not touched.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

disk/README.md

@@ -146,6 +146,20 @@ carrying timestamp noise in git history.
   GPT-partition-relative offset together once a GPT parser exists, not
   attempted ahead of that.
 
+- `zuse-scratch/artemis.img` + `zuse-scratch/zuse-thumb-ident.img` — a minted
+  Zuse pair, added 2026-10-26 (Captain Bob: "mint a scratch zuse drive", and
+  commit it) so that v4 work can go ahead with Zuse attached (`ENGINE.md` §2,
+  the identity gate). Minted from blank (1 GiB / 64 MiB) by a `system=v3` amd64
+  boot (`logs/20261026-081016`: "Zuse: genesis minted onto attached
+  thumbdrive") and confirmed by a second (`logs/20261026-081116`: "Zuse:
+  identity confirmed from attached thumbdrive"). **The two are a pair:** the
+  genesis marker naming Zuse's public key is on the Artemis disk's metadata
+  fence, so the thumbdrive is recognised only with this `artemis.img`. Boot
+  with `ARTDISK=` and `ZUSEDISK=` pointing at *copies*, so the committed pair
+  stays as minted. Not a re-mint of the committed `artemis.img` /
+  `thumbdrives/zuse-thumb-ident.img`, which stay blank (that call is Captain
+  Bob's).
+
 **Convention, standing as of 2026-08-22: every virtual disk/thumb-drive image
 used for testing — Artemis persistence disks above, and USB Mass Storage
 backing images alike — lives in this directory and is a tracked, committed