Plan an n8n workflow for a LeadUp business or client — connecting webhooks, APIs, CRMs, WhatsApp BSPs, Google Sheets, email, payment events, and AI calls into a clear graph with triggers, nodes, data mapping, credential placeholders, error handling, manual approval points, a test plan, and a text-form workflow diagram. Use when the user says "n8n workflow", "automation workflow", "build workflow", "webhook automation", "connect APIs", or "workflow builder".