Notify release-day tasks to team channel before launch

Release-day events aren't verified with task status, leaving deploy teams unsure. A channel alert posts for completed release tasks scheduled the next day, giving teams context before launch.

Overview

When release events aren't validated against task status, deployments can stall and on-call staff scramble. This flow posts a clear channel alert for completed release tasks scheduled the next day, giving deploy teams actionable context at least 24 hours ahead.