Function get_coordinated_cursor 

pub async fn get_coordinated_cursor(
    table: &DeltaTable,
    external_key: &str,
) -> Result<Option<CoordinatedCommitCursor>, ConnectorError>

Read the atomic checkpoint/fencing cursor for one coordinated namespace.

Both Delta txn actions must be present or absent. A partial pair is corruption, never a fresh target. Delta transaction versions are treated as opaque persisted values and checked explicitly rather than assumed to be monotonic.

Errors

Returns an error when the table cursor is unreadable, partial, or outside Laminar’s checkpoint/fencing ranges.