BDN Sealed Volumes: publish once, mount anywhere

Baseten released BDN Sealed Volumes, which let you publish read-only data such as model weights, LoRA adapters, indexes, and compiled engines once as an immutable, digest-addressed version and mount it in any deployment via config.yaml. Volumes are pushed or synced from Hugging Face, S3, GCS, Azure Blob, Cloudflare R2, CoreWeave buckets, or local directories, with chunk-level deduplication so updates upload only changed bytes, and mounts start in seconds without a download step. Existing weights-block deployments will be migrated automatically, and the feature requires Baseten CLI 1.1.0+ and Truss 0.18.30+ if applicable.