Create calendar task for requested pull request reviews

Pull request review requests arrive without scheduled tasks, leaving reviewers unprepared and slowing reviews. Create scheduled review tasks so assignees get due dates and context before releases.

Overview

Missed or untracked review requests slow releases and frustrate engineers; this flow turns every review request into a scheduled, owner-assigned task so reviewers get clear due dates and context. That means fewer stalled PRs and reviews happening within hours or ahead of the next release window.