feat: dix all pdf problems. Validator now green

lib/append.go

@@ -70,12 +70,13 @@ func AppendToPdf(
 	defer inputFile.Close()
 
 	var result io.Reader
-	result, err = addAttachment(inputFile, inputXmlFilePath, embedName, description)
+
+	result, err = addXmpData(inputFile)
 	if err != nil {
 		return err
 	}
 
-	result, err = addXmpData(result)
+	result, err = addAttachment(result, inputXmlFilePath, embedName, description)
 	if err != nil {
 		return err
 	}
@@ -120,7 +121,7 @@ func addAttachment(
 		return nil, err
 	}
 
-	err = doc.AddAttachment(attachment.Attachment{
+	err = AddAttachment(doc, attachment.Attachment{
 		Name:         embedName,
 		Description:  description,
 		MIMEType:     "text/xml",