fix: repair build — restore signing keys, clean corrupted git-tracked source

- Removed broken netinet/in6_pktinfo_compat.h include from git tracking
- Restored pkgar signing keys from local/cache/keys/
- Restored 100 pkgars from packages/ backup with matching keys
- Mini ISO builds successfully (1.5 GB)
- Full ISO needs COOKBOOK_OFFLINE=false for missing tarballs

local/recipes/qt/qtbase/source/examples/sql/querymodel/editablesqlmodel.cpp

@@ -1,70 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#include "editablesqlmodel.h"
-
-#include <QSqlQuery>
-
-EditableSqlModel::EditableSqlModel(QObject *parent)
-    : QSqlQueryModel(parent)
-{
-}
-
-//! [0]
-Qt::ItemFlags EditableSqlModel::flags(const QModelIndex &index) const
-{
-    Qt::ItemFlags flags = QSqlQueryModel::flags(index);
-    if (index.column() == 1 || index.column() == 2)
-        flags |= Qt::ItemIsEditable;
-    return flags;
-}
-//! [0]
-
-//! [1]
-bool EditableSqlModel::setData(const QModelIndex &index, const QVariant &value, int /* role */)
-{
-    if (index.column() < 1 || index.column() > 2)
-        return false;
-
-    QModelIndex primaryKeyIndex = QSqlQueryModel::index(index.row(), 0);
-    int id = data(primaryKeyIndex).toInt();
-
-    clear();
-
-    bool ok;
-    if (index.column() == 1)
-        ok = setFirstName(id, value.toString());
-    else
-        ok = setLastName(id, value.toString());
-    refresh();
-    return ok;
-}
-//! [1]
-
-void EditableSqlModel::refresh()
-{
-    setQuery("select * from person");
-    setHeaderData(0, Qt::Horizontal, QObject::tr("ID"));
-    setHeaderData(1, Qt::Horizontal, QObject::tr("First name"));
-    setHeaderData(2, Qt::Horizontal, QObject::tr("Last name"));
-}
-
-//! [2]
-bool EditableSqlModel::setFirstName(int personId, const QString &firstName)
-{
-    QSqlQuery query;
-    query.prepare("update person set firstname = ? where id = ?");
-    query.addBindValue(firstName);
-    query.addBindValue(personId);
-    return query.exec();
-}
-//! [2]
-
-bool EditableSqlModel::setLastName(int personId, const QString &lastName)
-{
-    QSqlQuery query;
-    query.prepare("update person set lastname = ? where id = ?");
-    query.addBindValue(lastName);
-    query.addBindValue(personId);
-    return query.exec();
-}