CoreWeave AI Object Storage: Cross-region writes, Archive

Introduces cross-region write acceleration for CoreWeave AI Object Storage, enabling writes to remote buckets at local latency by writing durably to the local region first and then migrating data to the remote region in the background. Also introduces a new Archive storage class for infrequently accessed data, with no retrieval, cache, request, early-deletion, tiering, or egress fees, and a longer time to first byte compared to other tiers. These features aim to reduce operational overhead and cost by allowing compute to be placed where available without data relocation complexities.