Between July 2025 and June 2026, some table data profiles saved to BigQuery contained an incorrect

## Fix Fixed Between July 2025 and June 2026, some [table data profiles](https://cloud.google.com/sensitive-data-protection/docs/metrics-reference#table-data-profile) saved to BigQuery contained an incorrect`1970-01-01` timestamp instead of `NULL` in [expiration\_time](https://cloud.google.com/sensitive-data-protection/docs/reference/rest/v2/organizations.locations.tableDataProfiles#TableDataProfile.FIELDS.expiration%5Ftime)for tables that don't expire. This issue has been fixed. New exports of table data profiles show the correct expiration timestamps.