(Removes word hold from headline, no change to text) By Julien Pretot and Krystal Hu BEIJING (Reuters) – More than six weeks went by from the time teenage Russian figure skater Kamila Valieva’s sample was collected and the day she heard at the Beijing Olympics that she tested positive for a banned substance at her national championships. The Russian Olympic Committee (ROC) immediately questioned the timeline, wondering what might have happened in that time frame after the Russian Anti-Doping Agency (RUSADA) lifted the 15-year-old’s provisional suspension, allowing her to further train and comp…