SERIES PREMIERE: Concluding next week, this four-hour, two-night documentary traces the emigration of Italians to the United States, recounting bias and difficulties as well as innovations and triumphs. One story it doesn’t tell, so I will: my grandfather, Vitale Bianculli, came to America in 1911, arriving from a small mountain village in what would be the “ankle” of Italy. He was a tailor, despite having lost a few fingers in a childhood firecracker explosion. And since U.S.