Run, poll, and download a report via the Google Ad Manager SOAP ReportService

Steps

1. Build a ReportQuery (or retrieve a saved query via ReportService.getSavedQueriesByStatement) with dimensions, columns, dimensionAttributes, a filter Statement, and a date range
2. Wrap it in a ReportJob and call ReportService.runReportJob to start execution
3. Poll ReportService.getReportJobStatus until it returns COMPLETED, or use a client library helper that polls automatically
4. Call ReportService.getReportDownloadURL with the desired ExportFormat (use CSV_DUMP for further machine processing) to fetch the file
5. Parse the downloaded CSV/TSV for downstream processing