feat: add sql init

src/LicenseModel/LicenseModel.h

@@ -2,6 +2,7 @@
 #define LICENSEMANAGER_LICENSEMODEL_H
 
 #include <QAbstractTableModel>
+#include <QtSql/QSqlDatabase>
 
 class LicenseModel : public QAbstractTableModel
 {
@@ -41,9 +42,14 @@ public:
     Status getStatus();
     QString getStatusText();
 
+private:
+    bool checkTables();
+
 private:
     QList<LicenseItem> m_data;
+    Status m_status = Status::None;
     QStringList m_errors;
+    QSqlDatabase m_db;
 };