Advanced AI Prompt for Implementing Terraform Remote State Data Sources

Act as a Platform Infrastructure Engineer. Design a secure cross-stack communication pattern exclusively utilizing the `terraform_remote_state` data source. The downstream [DEPENDENT_STACK] workspace must ingest critical, read-only [OUTPUT_KEYS] (e.g., VPC IDs, Subnet ARNs) exported from the foundational networking stack residing at [SOURCE_STATE_PATH]. Output the exact HCL syntax for the remote state `data` block configuration (handling authentication to the backend), and demonstrate the interpolation logic to bind those fetched outputs into local resource definitions. Discuss the severe architectural trade-offs of tight workspace coupling and detail the error-handling required if the source state is locked or corrupted.