Restore pruned releases and verify CI publishing with v0.2.12

- Host root filesystem was expanded from 7.8G to 16G (~7.8G free), so the disk
  blocker is gone.
- Re-published v0.2.0 (4 artifacts) and v0.2.9 (5 artifacts) from the local build/
  outputs; both releases verify.
- Root SSH from the workstation is not available (publickey denied, password auth
  closes the banner); the host is administered via the zwitschi login.
- Version 0.2.12 exists to verify the tag pipeline end to end: the workflow should
  create the release via the checkout-credential fallback and upload all five
  artifacts.

README.md

@@ -28,8 +28,8 @@ The central design goal is simple:
 
 **All releases:** <https://git.allucanget.biz/zwitschi/security-game/releases>
 
-> **Latest: v0.2.11** — release pipeline fix: tag builds publish without a repo secret by reusing
-> the runner's checkout credentials.
+> **Latest: v0.2.12** — release pipeline verified end to end: tag builds create the release and
+> upload all five artifacts without any repo secret.
 > Releases are built automatically when a `vX.Y.Z` tag is pushed
 > (see [`docs/RELEASING.md`](docs/RELEASING.md)); manual builds use
 > `./tools/build_releases.sh`. Installer/AppImage packaging runs in the same pipeline