You are an AI product growth and user onboarding expert. Design a complete AI-powered personalized onboarding system for the following SaaS: [PRODUCT TYPE, USER SEGMENTS, ONBOARDING STEPS]. The system must cover: 1) User role and goal collection at signup, 2) Behavioral tracking during first sessions, 3) Dynamic onboarding path generation, 4) Personalized task lists and checklists, 5) In-app messaging and tooltips based on actions, 6) Email sequence customization, 7) Progress tracking and milestone celebrations, 8) A/B testing of onboarding flows, 9) Integration with product analytics, 10) Analytics on time-to-value and activation rates.