docs: METHOD-CHANGELOG — 2026-05-06 entry for Forgejo build path

Append a v0.5.32 entry documenting that ISO builds moved from GitHub
Actions to the Forgejo runner on nullstone, that the hybrid VM test
procedure is unchanged, that the ISO is now pulled from the
ci-latest Forgejo release tag, and that virtio-9p host log capture
is on by default (replaces the broken virtio-serial path flagged by
Agent 6 in the 2026-05-05 wave).

TESTING.md itself is intentionally untouched — only the build host
and download URL changed; the procedure prose still applies as-is.

test/METHOD-CHANGELOG.md

@@ -9,6 +9,50 @@ Entries are newest-first.
 
 ---
 
+## 2026-05-06 · v0.5.32 · ISO build path moved to Forgejo
+
+**Change:** Build host for the test ISO has moved off GitHub Actions
+onto the Forgejo runner on nullstone. The hybrid VM test procedure in
+`TESTING.md` is **unchanged** — the gum installer still drives every
+step it can, the operator still types the LUKS + admin passwords
+directly into the QEMU window. The only thing different is where the
+ISO comes from and how the host log is captured.
+
+**Practical deltas for testers:**
+
+- ISO download: from the Forgejo `ci-latest` rolling release at
+  <https://git.s8n.ru/veilor-org/veilor-os/releases/tag/ci-latest>.
+  The tag is force-replaced on each successful `build-iso.yml` run, so
+  always re-download — don't rely on a cached copy.
+- Re-flash to USB / virtio-blk image via Etcher / `dd` — **unchanged**.
+  Same `sha256sum -c` step; same image format.
+- virtio-9p host log capture is now **active by default** in
+  `test/run-vm.sh`. This replaces the broken virtio-serial path
+  flagged by Agent 6 in the 2026-05-05 wave; Anaconda logs land in the
+  host-side mount automatically once the VM boots, no manual `tail -f`
+  on a broken serial console.
+- Build host for the record: forgejo-runner on nullstone, runner label
+  `ubuntu-24.04`, image `catthehacker/ubuntu:act-24.04`. Reproducibility
+  is unchanged from the GH Actions ubuntu-24.04 base — the act image
+  matches GHA's runner image to within package versions.
+
+**Why:** GitHub mirror was disabled 2026-05-06 (repo is now
+private-by-default on Forgejo); GH Actions builds would just stop
+producing artifacts. Moving CI in-house onto nullstone keeps the
+test/release loop intact and removes the external dependency for
+private-build cycles. Documenting the change here so a future tester
+reading TESTING.md doesn't waste time hunting an artifact in a
+GitHub run that never happened.
+
+**Files touched in this entry:**
+- `test/METHOD-CHANGELOG.md` — this entry.
+
+`test/TESTING.md` itself is **not** edited — the procedure prose still
+applies verbatim. Only the build host and the URL where the ISO lives
+changed.
+
+---
+
 ## 2026-05-05 · v0.5.27 · TESTING.md created
 
 **Change:** First version of the canonical procedure document.