pub fn wrap(
signer: &dyn CursorSigner,
cluster: &ClusterId,
cursor: &str,
) -> StringExpand description
Wraps cursor (the upstream scroll/PIT id) with cluster into a signed,
self-describing token for the client. Format {cluster_hex}.{tag_hex}.{cursor},
the cursor verbatim (it is base64, so it never contains the . delimiter).