Advanced AI Prompt for Synchronizing Terraform State across Multi-Region Backends

Act as a Disaster Recovery Architect. Design an active-passive multi-region Terraform state storage architecture to survive total regional loss. The primary S3 state bucket and DynamoDB lock table reside in [PRIMARY_REGION]. Define the AWS CLI or Terraform code to configure a strict [REPLICATION_POLICY] (S3 Cross-Region Replication with RTC) streaming the state files to the [SECONDARY_REGIONS]. Architect the failover protocol: explain exactly how to handle state locking during a disaster when the primary DynamoDB table is unreachable. Provide a runbook script that dynamically rewrites the `backend.tf` to point to the secondary region and forces a `terraform init -reconfigure` to restore CI/CD deployment capabilities within minutes.