Use IAM application resource-control and policy Scoped backup access.
OpenBao path is platform/workloads/railiance/backup/object-storage.
rapp-postgres keeps Secret platform-pg-backup-s3 as the first projection.
Document the one recipe a new rapp uses to acquire runtime secrets:
standing KV secrets bind through a CCR target.rapp, leases through
grant rapp_id. Stamp the existing postgres grants and the qonto
workload CCR. Gate, delivery, and revocation are unchanged.