add required gh workflow for api-server backwards compatibility

.github/workflows/ci-testing-deploy.yml

@@ -2771,3 +2771,27 @@ jobs:
           ./ci/github/helpers/openapi-specs-backwards-compatibility.bash breaking \
             https://raw.githubusercontent.com/${{ github.event.pull_request.base.repo.full_name }}/refs/heads/${{ github.event.pull_request.base.ref }} \
             .
+
+  api-server-backwards-compatible:
+    needs: [changes]
+    if: ${{ needs.changes.outputs.anything-py == 'true' || github.event_name == 'push' }}
+    timeout-minutes: 10
+    name: "api-server-backwards-compatibility"
+    runs-on: ubuntu-latest
+    steps:
+      - name: setup python environment
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+      - name: install uv
+        uses: astral-sh/setup-uv@v4
+        with:
+          version: "0.4.x"
+          enable-cache: false
+      - name: checkout
+        uses: actions/checkout@v4
+      - name: Check api-server backwards compatibility
+        run: |
+          ./scripts/openapi-diff.bash breaking --fail-on ERR\
+            https://raw.githubusercontent.com/${{ github.event.pull_request.base.repo.full_name }}/refs/heads/${{ github.event.pull_request.base.ref }}/services/api-server/openapi.json \
+            ./services/api-server/openapi.json