Import Batch Total Rows

The totalRows on an ImportBatch gives compliance staff an immediate sense of the dataset size. Together with validRows, warningRows, and errorRows, it provides a breakdown of how the file parsed. If totalRows is much larger than validRows plus warningRows, the difference shows up as errorRows — indicating rows Piper could not process. Reviewing totalRows against the expected sample count from the lab's chain-of-custody helps confirm the file is complete before committing the batch.