A financial services client is deploying a CyberArk PAM solution across two geographically separate data centers for disaster recovery. The primary data center hosts the active Vault, and the secondary data center hosts a passive DR Vault. The client's RPO is near-zero, and the RTO is 4 hours. The network link between the data centers is stable but has variable latency. Which Vault replication method should be implemented to meet these requirements?