CsvReader.stats
Access read statistics and, optionally, diagnostics collected during iteration.
rows: number of successfully yielded rows (includes header when present).badRows: number of malformed rows that were skipped (permissive mode) or encountered (failFast mode).errors: total number of errors recorded.lastError: the most recent error (code/line/column/message).diagnostics: per-error list populated only whenCsvDialect.collectDiagnostics == true.