NXT acknowledgement status and appeal matching

For GiveCampus integrations and API.

In the Blackbaud integration settings, the acknowledgement-status setting controls the status written on gift export; review it before exporting future gifts. The gift export matches the giving campaign/form Unique Identifier against imported NXT appeal lookup IDs and uses the matching appeal record ID. A blank appeal is not fixed merely by typing an unrelated campaign label: choose the correct imported NXT appeal/identifier and check that the appeal record is available. Existing exported gifts/batches need separate reconciliation; changing a default does not confirm that past batches were rewritten.