“In the Summers,” an affecting, years-spanning drama about a complicated parent-children relationship, nabbed the Grand Jury prize at the 40th Sundance Film Festival, while the top honor for documentary went to “Porcelain War,” about a Ukrainian couple who craft fragile, intricately painted ceramics while war rages around them. “In the Summers,” written and directed by Alessandra Lacorazza, poetically follows an imperfect father and his daughters over nearly two decades. “Porcelain War,” which follows last year’s “20 Days in Mariupol” as a Sundance documentary prize-winner that captures the war in Ukraine, was made by Brendan Bellomo and Slava Leontyev.