I need a developer to set up a fully automated flow on the WhatsApp Business API that focuses exclusively on lead generation. The system should trigger a series of pre-approved templates—an introductory greeting, detailed product or service information, and timed promotional offers—so every new prospect receives a structured nurturing sequence without manual intervention. All contacts and conversation data must flow into my existing database (SQL-based) in real time. I’ll handle the database schema; you just have to push and pull the right fields so I can track each lead’s stage and campaign source. For clarity, the project is considered complete when: • The WhatsApp Business API is live under my number and verified. • Incoming leads automatically receive the three-step message sequence. • Delivery reports and lead data are written to the database and can be queried. • Clear instructions or scripts are supplied so I can update message templates later. Please outline your approach, preferred tech stack or libraries, and any recent WhatsApp API work when you respond.