Opaque resume cursor round-tripped between a source and the run tracker. A source populates exactly one of these depending on how it paginates; the engine never interprets it.
Optional
Last-seen key for keyset (seek) paginated sources — the single-PK value as a string.
Offset (StartRow) for offset-paginated sources.
Opaque resume cursor round-tripped between a source and the run tracker. A source populates exactly one of these depending on how it paginates; the engine never interprets it.