add sentinel job

Author: VenelinMartinov

.github/workflows/build-and-test.yml

@@ -154,3 +154,25 @@ jobs:
           version: v1.62
       - name: Lint
         run: make lint
+  sentinel:
+    name: sentinel
+    if: github.event_name == 'repository_dispatch' ||
+      github.event.pull_request.head.repo.full_name == github.repository
+    permissions:
+      statuses: write
+    needs:
+    - test
+    - lint
+    runs-on: ubuntu-latest
+    steps:
+    - uses: guibranco/github-status-action-v2@0849440ec82c5fa69b2377725b9b7852a3977e76 # v1.1.13
+      with:
+        authToken: ${{secrets.GITHUB_TOKEN}}
+        # Write an explicit status check called "Sentinel" which will only pass if this code really runs.
+        # This should always be a required check for PRs.
+        context: 'Sentinel'
+        description: 'All required checks passed'
+        state: 'success'
+        # Write to the PR commit SHA if it's available as we don't want the merge commit sha,
+        # otherwise use the current SHA for any other type of build.
+        sha: ${{ github.event.pull_request.head.sha || github.sha }}