You are a customer success content strategist. Create a detailed guide on developing a library of customer success stories. The guide must cover: 1) Identifying customers for success stories, 2) Interviewing customers for compelling narratives, 3) Structuring success stories: challenge, solution, results, 4) Writing formats: case studies, videos, podcasts, 5) Incorporating data and metrics, 6) Getting approvals and testimonials, 7) Distributing success stories across channels, 8) Using success stories in sales enablement, 9) Measuring success story impact, 10) Building a library of stories. Provide templates and examples.