debug backport action

.github/workflows/backport.yml

@@ -11,6 +11,13 @@ permissions:
   pull-requests: write # so it can create pull requests
 
 jobs:
+  debug:
+    name: Debug
+    runs-on: ubuntu-24.04
+    if: github.event_name == 'issue_comment' && startsWith(github.event.comment.body, '/backport')
+    steps:
+      - name: Dump event
+        run: echo '${{ toJSON(github.event) }}'
   backport:
     name: Backport pull request
     runs-on: ubuntu-24.04