BATON ROUGE — Some $3.08 billion in total has been invested into downtown Baton Rouge over the past three decades, according to the Downtown Development District’s 2026 Development Toolkit released on Tuesday.The annual Development Toolkit, launched by the DDD in 2014, offers up-to-date data and insights on downtown and serves as a resource to attract future investors, business owners and developers to Downtown Baton Rouge. It includes statistic…