Identify the NXT gift batch from the GiveCampus export

For GiveCampus integrations and API.

The native gift export creates an NXT gift batch and records its batch number, system ID and description in the GiveCampus export run. Locate the successful giving-day export and use that batch number/description to find the corresponding NXT gift batch. Descriptions can include a deposit ID and export timestamp, so a giving day is not necessarily one batch named after the campaign. If the export is failed or absent, resolve that first; an export configuration alone does not prove a batch exists. Exact external navigation depends on NXT access and interface.