Add temporary Claude add-on build diagnostics

.github/workflows/pr2841-diagnostic.yml

@@ -0,0 +1,52 @@
+---
+name: PR 2841 Build Diagnostic
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  diagnose:
+    if: ${{ github.event.pull_request.number == 2841 }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v7
+
+      - name: Gather add-on information
+        id: information
+        uses: frenck/action-addon-information@v1.4
+        with:
+          path: ./claude_desktop/
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v4
+
+      - name: Build aarch64 and capture tail
+        shell: bash
+        run: |
+          set +e
+          BUILD_FROM="$(jq -r '.build_from.aarch64 // empty' '${{ steps.information.outputs.build }}')"
+          docker buildx build \
+            --platform linux/arm64 \
+            --progress=plain \
+            --build-arg "BUILD_FROM=${BUILD_FROM}" \
+            --file claude_desktop/Dockerfile \
+            claude_desktop >build.log 2>&1
+          status=$?
+          tail -n 300 build.log >build-tail.log
+          printf 'build_status=%s\n' "$status" >build-status.txt
+          exit 0
+
+      - name: Upload diagnostic log
+        uses: actions/upload-artifact@v4
+        with:
+          name: pr2841-aarch64-build-log
+          path: |
+            build-tail.log
+            build-status.txt
+          retention-days: 1