Russia’s largest oil producer just flashed a signal Moscow didn’t want to see: Rosneft is recommending its smallest interim dividend since the pandemic year of 2020. For a company that has spent the past two decades styling itself as a reliable cash machine for the Kremlin, a 11.56-ruble per share payout is not just stingy, it’s a symptom. The timing is exquisite. The proposed dividend lands one day before the Trump administration’s sanctions against Rosneft and Lukoil formally hammer into place. Investors saw this coming.…