Update parent task pipeline field when subtask closes

Your closed subtasks aren't updating parent pipeline, creating campaign stage confusion and handoff delays. Update parent pipeline automatically so campaign managers see correct stages same day.

Overview

Closed subtasks often leave parent tasks showing the wrong campaign stage, which forces campaign managers into manual catch-up. This flow updates the parent pipeline automatically when a subtask closes so managers see true stage within minutes and avoid last-minute reconciliation ahead of retrospectives.