Use shared Python version check action

.github/workflows/check-python-versions.yml

@@ -19,42 +19,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-      - uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
+      - name: Check supported Python versions
+        uses: microsoft/pylance-engineering/actions/check-python-versions@a81ceb5dc25ea56bd0c957ccda3a48886682faea
         with:
-          python-version: '3.15'
-      - name: Check for a new Python version
-        id: check
-        shell: bash
-        run: |
-          version="$(python build/update_python_versions.py)"
-          echo "version=$version" >> "$GITHUB_OUTPUT"
-      - name: Create issue
-        if: steps.check.outputs.version != ''
-        env:
-          GH_TOKEN: ${{ github.token }}
-          VERSION: ${{ steps.check.outputs.version }}
-        shell: bash
-        run: |
-          title="CI Python Versions: Update to Python $VERSION"
-          issue_number="$(
-            gh api --paginate \
-              -H "X-GitHub-Api-Version: 2022-11-28" \
-              "/repos/$GITHUB_REPOSITORY/issues?state=all&per_page=100" \
-              --jq ".[] | select(has(\"pull_request\") | not) | select(.title == \"$title\") | .number"
-          )"
-          if [[ -z "$issue_number" ]]; then
-            gh issue create \
-              --title "$title" \
-              --label debt \
-              --label python-version \
-              --body "Python $VERSION has a published release candidate according to the [Python.org downloads API](https://www.python.org/api/v2/downloads/release/?is_published=true&pre_release=true&version=3), but is missing from at least one CI test matrix.
-
-          ### Requested changes
-          - [ ] Ensure every explicit-version \`python-version\` matrix in \`.github/workflows/pr-check.yml\` includes Python $VERSION.
-          - [ ] Ensure every explicit-version \`python-version\` matrix in \`.github/workflows/push-check.yml\` includes Python $VERSION.
-          - [ ] Run the tests on Python $VERSION and resolve any compatibility failures.
-
-          Compare matrix entries by major.minor; patch and prerelease/dev variants of $VERSION already count as coverage. Add the version only where missing and preserve existing entries. Floating \`3.x\` entries do not declare release-candidate coverage.
-
-          Keep minimum-supported-version and build-runtime Python pins unchanged; adding CI coverage does not require raising the minimum supported Python version."
-          fi
+          files: |
+            - path: .github/workflows/pr-check.yml
+              key: python-version
+            - path: .github/workflows/push-check.yml
+              key: python-version
+          token: ${{ github.token }}
+          issue-labels: debt,python-version