PR explainer

Workflow runs for PR explainer

• ci: add PR explainer workflow (cloud + --upsert)

  completed successfully:
  PR explainer#2:Pull request#6synchronizebyutsengar
  ci/pr-explainer-workflow

  May 24, 20262m 11s
  More actions for workflow run 2

• ci: add PR explainer workflow (cloud + --upsert)

  failed:
  PR explainer#1:Pull request#6openedbyutsengar
  ci/pr-explainer-workflow

  May 24, 20262m 44s
  More actions for workflow run 1