New PATCH API endpoint for external contacts

Administrators can now use the PATCH API endpoint to partially update external contact records in the Genesys Cloud Customer Profile. This enhancement allows integrations and internal services to update only specific fields on an external contact without sending or replacing the full contact record. Partial updates help reduce data overwrite risk and improve performance for CRM synchronization and Architect flows. Release notes: https://help.genesys.cloud/release-notes/genesys-cloud/march-2-2026/