(Reuters) – Russia held a funeral service for the deputy commander of its Black Sea Fleet in annexed Crimea on Wednesday, the latest in what Ukraine says is a string of high-ranking Russian military casualties since Moscow invaded on Feb. 24. Ukrainian presidential adviser Mykhailo Podolyak on Sunday named six Russian generals who he said had been killed in Ukraine along with dozens of colonels and other officers. Russia’s Defence Ministry has not confirmed any of those casualties. It has not revised its troop casualties since March 2, a week into the war, when it said that 498 of its soldiers…