fix(ci): inline smoke-vm as a step instead of a downstream job

The separate smoke-vm job with `needs: build-iso` required round-tripping
the 1.5 GB ISO through actions/upload-artifact + download-artifact. v3
on Forgejo has a known issue where large artifacts stall at 0.0% in the
download step — the smoke run hung today with endless "Total file count:
1 ---- Processed file #0 (0.0%)" output.

Since both jobs run on the same self-hosted runner (host mode, same
workspace available), there was never a real need for the artifact
indirection. Inlining as a step after the artifact upload reuses the
ISO already in iso/out/ and skips the download entirely.

step-level continue-on-error preserves the original guarantee that a
VM-side flake doesn't mark the ISO build red.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.forgejo/workflows/build-iso.yml

@@ -51,28 +51,13 @@ jobs:
           retention-days: 14
           if-no-files-found: error
 
-  smoke-vm:
-    # Boot the freshly built ISO in a VM on the .165 Proxmox test host and
-    # check the webinstaller responds on :5000. Shares the runner workspace
-    # with build-iso via `needs:` so we skip the artifact round-trip.
-    # `continue-on-error: true` so a VM-side flake doesn't mark the ISO
-    # build red — the ISO itself is still valid and uploaded.
-    needs: build-iso
-    runs-on: self-hosted
-    continue-on-error: true
-    timeout-minutes: 10
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Re-download ISO into iso/out
-        # `needs:` doesn't preserve the workspace across jobs on Forgejo
-        # host-mode runners, so pull the artifact we just uploaded.
-        uses: actions/download-artifact@v3
-        with:
-          name: furtka-iso
-          path: iso/out
-
       - name: Smoke-test ISO on Proxmox test host
+        # Inlined as a step (rather than a separate job with `needs:`) so
+        # we can reuse the ISO that's already in the workspace — Forgejo's
+        # actions/download-artifact@v3 hangs on 1.5 GB files.
+        # step-level continue-on-error: a VM-side flake doesn't mark the
+        # ISO build red, the ISO itself is still valid and uploaded.
+        continue-on-error: true
         env:
           PVE_TEST_HOST: ${{ secrets.PVE_TEST_HOST }}
           PVE_TEST_TOKEN: ${{ secrets.PVE_TEST_TOKEN }}