/// an ordered list of user IDs, with their corresponding crypto_box of a RefreshSecretV0.
/// an ordered list of user IDs, with their corresponding crypto_box of a RefreshSecretV0.
/// A User ID for each Member, Signer and Owner of the repo (except the one that is being excluded, if any)
/// A hashed User ID for each Member (use author_digest()), Signer and Owner of the repo (except the one that is being excluded, if any)
/// the ordering is important as it allows receivers to perform a binary search on the array (searching for their own ID)
/// the ordering is important as it allows receivers to perform a binary search on the array (searching for their own ID)
/// the refresh secret is used for encrypting the SyncSignature commit's key in the event sent in old topic (RefreshSecretV0.0) and for an optional write_cap refresh (RefreshSecretV0.1)
/// the refresh secret is used for encrypting the SyncSignature commit's key in the event sent in old topic (RefreshSecretV0.0) and for an optional write_cap refresh (RefreshSecretV0.1)
/// - key: BLAKE3 derive_key ("NextGraph UserId Hash Overlay Id for Commit BLAKE3 key", overlayId)
/// hash will be different than for ForwardedPeerAdvertV0 so that core brokers dealing with public sites wont be able to correlate commits and editing peers (via common author's hash).
/// hash will be different than for ForwardedPeerAdvertV0 so that core brokers dealing with public sites wont be able to correlate commits and editing peers (via common author's hash).
/// only the brokers of the authors that pin a repo for outeroverlay exposure, will be able to correlate.
/// only the brokers of the authors that pin a repo for outeroverlay exposure, will be able to correlate.
/// it also is a different hash than the InboxId, and the OuterOverlayId, which is good to prevent correlation when the RepoId is used as author (for Repository, RootBranch and Branch commits)
/// it also is a different hash than the InboxId, and the OuterOverlayId, which is good to prevent correlation when the RepoId is used as author (for Repository, RootBranch and Branch commits)