ci: trigger packaging repo promote on tag release

.github/workflows/trigger-pkg-promote.yml

@@ -0,0 +1,57 @@
+name: Trigger Package Promote on Tag Release
+
+on:
+  push:
+    tags:
+      - 'v*'    # Matches tags like v1.0.10, v1.1.0, etc.
+
+permissions:
+  contents: read
+
+jobs:
+  trigger-promote:
+    name: Trigger Promote New Upstream Version in packaging repo
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0    # Fetch all history and branches to check tag ancestry
+
+      - name: Check if tag is on video.qclinux.main branch
+        id: check-branch
+        run: |
+          TAG_COMMIT=$(git rev-list -n 1 "${{ github.ref_name }}")
+          echo "Tag commit: $TAG_COMMIT"
+
+          # Check if the tag commit is reachable from video.qclinux.main
+          if git merge-base --is-ancestor "$TAG_COMMIT" origin/video.qclinux.main; then
+            echo "Tag is on video.qclinux.main branch, proceeding with promote."
+            echo "should_promote=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "Tag is NOT on video.qclinux.main branch, skipping promote."
+            echo "should_promote=false" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Trigger Promote New Upstream Version
+        if: steps.check-branch.outputs.should_promote == 'true'
+        uses: actions/github-script@v7
+        with:
+          github-token: ${{ secrets.DEB_PKG_BOT_CI_TOKEN }}
+          script: |
+            const tag = context.ref.replace('refs/tags/', '');
+            console.log(`New upstream tag detected: ${tag}`);
+
+            const pkgRepo = '${{ vars.PKG_REPO_GITHUB_NAME }}';
+            const [owner, repo] = pkgRepo.split('/');
+
+            await github.rest.actions.createWorkflowDispatch({
+              owner: owner,
+              repo: repo,
+              workflow_id: 'promote-upstream.yml',
+              ref: 'main',
+              inputs: {
+                'upstream-tag': tag
+              }
+            });
+            console.log(`Successfully triggered Promote New Upstream Version for tag: ${tag} in ${pkgRepo}`);