qtprotobuf: mark security critical source files

Reviewed and marked all security critical files in the
qtgrpc/src/protobuf directory.

More information: https://contribute.qt-project.org/quips/23

Fixes: QTBUG-135456
Pick-to: 6.10
Change-Id: I9cc05039ca5830d04816ada978ec193ece154732
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>

src/protobuf/protobufscalarserializers_p.h

@@ -1,5 +1,6 @@
 // Copyright (C) 2024 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+// Qt-Security score:critical reason:data-parser
 
 #ifndef PROTOBUFSCALARSERIALIZERS_P_H
 #define PROTOBUFSCALARSERIALIZERS_P_H

src/protobuf/qprotobufjsonserializer.cpp

@@ -1,5 +1,6 @@
 // Copyright (C) 2023 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+// Qt-Security score:critical reason:data-parser
 
 #include <QtProtobuf/qprotobufjsonserializer.h>
 

src/protobuf/qprotobufpropertyordering.cpp

@@ -1,5 +1,6 @@
 // Copyright (C) 2024 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+// Qt-Security score:critical reason:data-parser
 
 #include <QtProtobuf/qprotobufpropertyordering.h>
 

src/protobuf/qprotobufserializer.cpp

@@ -1,6 +1,7 @@
 // Copyright (C) 2022 The Qt Company Ltd.
 // Copyright (C) 2019 Alexey Edelev <semlanik@gmail.com>, Viktor Kopp <vifactor@gmail.com>
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+// Qt-Security score:critical reason:data-parser
 
 #include <QtProtobuf/qprotobufserializer.h>