Record Selected Message channel for communicating record selection events between components across the page. Used when a user selects a record in one component and other components need to react. true recordId The Id of the selected record recordName The name of the selected record objectApiName The API name of the object (e.g., Account, Contact) sourceComponent The name of the component that published this message timestamp When the selection occurred (ISO 8601 format) payload Additional data as JSON string for complex scenarios