NEW YORK — Donald Trump’s company impeded a grand jury investigation last year by repeatedly failing to turn over evidence in a timely fashion, leading to a secret contempt finding and a $4,000 fine, according to court records made public Tuesday.The Trump Organization was found to have been “willfully disobeying” four grand jury subpoenas and three court orders, to the detriment of Manhattan prosecutors who were left ill-prepared to question witnesses, Judge Juan Manuel Merchan ruled.The subpoenas, …