"Create a commercial-style, long shelf-life, oil-free dry beetroot chips recipe tailored to Bangladeshi taste. Include a crisp, savory-spiced profile with optional chili, cumin, black salt, and a touch of tang. Focus on a dehydrated/baked chip method that maximizes shelf life, texture, and food safety. Use imperial units only. Include ingredient amounts, clear steps, drying/baking temperatures and times, packaging/storage guidance, and notes for scaling up for small commercial production."