ops/devops: add console runner image CI build

.gitea/workflows/console-runner-image.yml

@@ -0,0 +1,32 @@
+name: console-runner-image
+
+on:
+  workflow_dispatch:
+  push:
+    paths:
+      - 'ops/devops/console/**'
+      - '.gitea/workflows/console-runner-image.yml'
+
+jobs:
+  build-runner-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build runner image tarball (baked caches)
+        env:
+          RUN_ID: ${{ github.run_id }}
+        run: |
+          set -euo pipefail
+          chmod +x ops/devops/console/build-runner-image.sh ops/devops/console/build-runner-image-ci.sh
+          ops/devops/console/build-runner-image-ci.sh
+
+      - name: Upload runner image artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: console-runner-image-${{ github.run_id }}
+          path: ops/devops/artifacts/console-runner/
+          retention-days: 14