In about a year, around 60 formerly homeless people will "graduate" to more independent living in downtown Seattle, making way for an equal number of people who will move into the "graduates'" current homes. The graduates will move to a $17 million development called Sylvia's Place. Construction started Tuesday on the project in the Belltown neighborhood. Sylvia's Place is one a handful of low-income housing projects under construction in downtown Seattle, where many luxury and market-rate projects…