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/sqlbrowser/qsqlconnectiondialog.h

@@ -1,39 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
-
-#ifndef QSQLCONNECTIONDIALOG_H
-#define QSQLCONNECTIONDIALOG_H
-
-#include <QDialog>
-
-#include <memory>
-
-QT_BEGIN_NAMESPACE
-namespace Ui
-{
-class QSqlConnectionDialogUi;
-}
-QT_END_NAMESPACE
-
-class QSqlConnectionDialog : public QDialog
-{
-    Q_OBJECT
-public:
-    explicit QSqlConnectionDialog(QWidget *parent = nullptr);
-    ~QSqlConnectionDialog() override;
-
-    QString driverName() const;
-    QString databaseName() const;
-    QString userName() const;
-    QString password() const;
-    QString hostName() const;
-    int port() const;
-    bool useInMemoryDatabase() const;
-
-    void accept() override;
-
-private:
-    const std::unique_ptr<Ui::QSqlConnectionDialogUi> m_ui;
-};
-
-#endif