MINISERIES PREMIERE: Ken Burns, writer Geoffrey C. Ward and the rest of Burns’ eager and talented collaborators present what emerges, ultimately, as the finest Ken Burns epic to date: a joint biography of Theodore, Franklin and Eleanor Roosevelt. The voices of those formidable historical figures are provided, respectively, by Paul Giamatti, Edward Herrmann and Meryl Streep, with narration by Peter Coyote and on-camera observations by, among others, Ward himself. Tonight’s Part 1, whi