FRANKFURT, Germany (AP) — The German economy is still failing to grow, figures showed Friday, as the country that should be the industrial powerhouse for all of Europe struggles with high energy prices, rising borrowing costs and a lagging rebound from key trading partner China. Economic output in Germany stagnated in the April-to-June quarter, the Federal Statistics Office said. That follows a decline of 0.1% in the first three months of the year and a drop of 0.4% in the last three months of 2022 as the energy shock from Russia’s war in Ukraine echoed through Europe’s largest economy. It…