I need the WhatsApp Business API wired into my existing customer-facing system so I can launch marketing and promotional flows that answer prospects automatically. The focus is automated responses—not one-off broadcasts—so the solution must let me pre-define message templates, schedule triggers, and pull customer data on the fly for personalization. Key things you’ll handle: • Register and verify my Facebook Business account, number, and templates. • Stand up the Cloud API (or an on-prem gateway if you think it’s wiser) and document the webhook endpoints. • Build the automation logic: incoming keyword detection, CRM/DB look-ups, and rule-based replies. • Show me how to upload and manage new marketing templates so I can stay compliant with WhatsApp’s policies. • End-to-end test with a small user set and hand over concise deployment instructions. Preferred stack is Node.js or Python, but I’m flexible as long as the code is clean and well-commented. I want this live ASAP, so please outline how quickly you can move through number activation, template approval, and initial campaign go-live.