Add signed marker to contract messages for team

You miss finalized contracts in a busy channel, delaying onboarding and billing for new clients. Flagged messages let account managers begin onboarding and billing the client the same day.

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Overview

Signed contracts can get buried in busy channels, slowing onboarding and invoicing. This flow flags and surfaces those messages to account managers automatically, so onboarding and billing can start the same day without manual scanning.