Daniel is flushed as he carries large trays of apple strudel granola through the small production hall. The Leipzig native and former drug user who lived in and out of squats, he finally lucked out when he found a job at granola maker Heyho in Lüneburg three years ago. It was a rocky road, he says. “I went cold turkey here.” But it was worth it. After having felt numb for 20 or 30 years, “Now I’m clean and still having fun.” Boss Timm Duffner, who founded Heyho, a company he says is a granola roastery with a social conscience, is also happy when he looks back at his work with Daniel. “At the s…