fix is_read

internal/service/letter_service.go

@@ -431,7 +431,7 @@ func (s *LetterServiceImpl) ListIncomingLetters(ctx context.Context, req *contra
 		isRead := false
 		if recipient, exists := batchData.recipients[letter.ID]; exists && recipient != nil {
 			isRead = recipient.ReadAt != nil
-			log.Printf("Recipient: %+v\n", recipient)
+			log.Printf("Recipient debug: %+v\n", recipient)
 		}
 
 		resp := transformer.LetterEntityToContract(&letter, attachments, dispositions, priority, institution)