BEIJING — In the decade since the Chinese government began repressing Falun Gong, a crusade that human rights groups say has led to the imprisonment of tens of thousands of practitioners and claimed at least 2,000 lives, the world's attention has shifted elsewhere. The drive against the spiritual group has eliminated its leadership, decimated the ranks of faithful and convinced many Chinese that the group is an "evil cult," as the government contends. But 10 years on, the war on Falun Gong remains unfinished.