feat(payments): filter candidates by DNI distance

app/Domains/Purchase/Resources/PurchaseResource.php

@@ -104,6 +104,7 @@ class PurchaseResource extends JsonResource
             'candidate_count' => $candidates->count(),
             'primary' => $primary === null ? null : [
                 'reason' => $primary->match_reason,
+                'dni_distance' => $primary->dni_distance,
                 'payment_amount' => $this->formatMoney($primary->payment_amount),
                 'purchase_amount' => $this->formatMoney($primary->purchase_amount),
                 'amount_difference' => $this->formatMoney($primary->amount_difference),