mintNextCursor(pageRows: readonly Record<string, unknown>[],orderBy: Readonly<Record<string, OrderDirection>>,keyColumns: readonly string[],fingerprint: string,hasMore: boolean): string | null
Mint the next-page cursor from the last row of a non-terminal page.
The cursor is only ever produced when hasMore is true AND the
page is non-empty: on a terminal page there is no next row to continue to,
and reading the ordered/key values off an empty page would crash on the
missing last row.
The rows of the page about to be returned (empty is fine)
orderBy: Readonly<Record<string, OrderDirection>>
The resolved sort specification