Record WP-0026 T07 promotion evidence (no secret values), mark the
offsite backup lane front door resolvable/ready, and add OpenBao policy
agent-high-risk-boundary for coding-agent metadata-only access.
Add workload KV lane for Nextcloud WebDAV token, URL, and age recovery
escrow at platform/workloads/railiance/backup/offsite-lane. Apply read
policy and OIDC role railiance-backup-workload-kv-read; wire forgejo-backup
to load credentials from OpenBao when env is unset.