computeMetadata method
Compute metadata for the given blob data without full encoding.
Returns BlobMetadata containing the blob ID, root hash, and other fields needed for on-chain registration.
data is the raw unencoded blob content.
numShards is the number of storage shards in the current committee.
Implementation
@override
Future<BlobMetadata> computeMetadata(Uint8List data, int numShards) async {
return computeMetadataSync(data, numShards);
}