Team Messages are not stored to db_cra. They exist in a separate OpenLDAP datastore that is only accessible via the ACMI CTI protocol. Using that protocol requires a developer contract with Cisco and thousands of hours to become proficient (Cisco's estimate, not mine).
The backstory is that CAD/CSD were built by Calabrio, not Cisco. They have their own processes and database behind the scenes. Cisco built bridges between the RmCm subsystem and the Calabrio processes using private APIs. CAD/CSD are going to be replaced by Finesse which will abandon all of the Calabrio process silo. At that point the story may change but for now I suggest you look at third-party wallboard products. Many of them provide a status message/banner-type feature.
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