Georgia officials looking to Washington for substantial funds to begin deepening the waterway to Savannah’s busy seaport found disheartening news Wednesday in President Barack Obama’s proposed budget, which seeks just $1.28 million in the coming fiscal year for the $652 million harbor expansion. The president’s request fell far short of the amount — “tens of millions” but likely less than $100 million, according to Georgia’s ports chief — the state hoped to see. The federal government gave final approval last fall to deepening the Savannah River from 42 to 47 feet between the port and the Atlantic Ocean.