Announce next weekly on-call owner to support channels

Your on-call roster lives in a separate schedule, leaving engineers without ownership context before shifts. Announce the upcoming owner in team channels to enable faster handovers ahead of the shift.

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Overview

When on-call ownership is unclear, incident responses slow and handoffs break down. This flow publishes the upcoming on-call owner to team channels and updates channel topics so support ops and engineers have clear context ahead of the shift, reducing handoff delays.