HashiCorp Vault Disaster Recovery and Zero Trust Continuity

Act as a Disaster Recovery Security Architect. Design a bulletproof Disaster Recovery (DR) and Business Continuity architecture for a mission-critical, globally distributed HashiCorp Vault Enterprise deployment. Conduct a highly technical, comparative analysis dictating exactly when to utilize Vault's native [REPLICATION_MODE] (specifically contrasting Performance Replication versus true Disaster Recovery Replication). Mathematically specify the [FAILOVER_THRESHOLD] required to trigger the automated promotion of secondary, cold-standby clusters to primary status. Detail the catastrophic impact of severe [NETWORK_LATENCY] (e.g., > 100ms between intercontinental datacenters) on the underlying Raft consensus quorum and how to mitigate split-brain scenarios. Most crucially, detail the exact operational procedure to maintain absolute Zero Trust identity consistency and active token states across all global regions during the precise moment a primary site failure occurs.