Storage node
#3256: enable storage pool support in storage node
Aggregator
#3284: The GET /v1/blobs/{blob_id} endpoint now returns
HTTP 503 with reason BLOB_UNAVAILABLE when a blob is temporarily
unretrievable (for example, mid-upload, mid-expiry, or when too many
storage nodes are unreachable to reconstruct the blob or determine a
definitive status). Previously these cases returned HTTP 500. The
terminal 404 BLOB_NOT_FOUND response for blobs that do not exist
is unchanged. Clients and CDNs should treat 503 as retryable with
backoff.
#3084: Blob attribute headers (such as Content-Type) are now correctly included on range request responses when reading blobs by object ID.