[STORY 4.1] Secure Lead Ingestion Engine

[RamonRiosJr]

📝 Description

Safely capture prospective leads navigating the digital business card via a normalized database ingestion pipeline.

🎯 Acceptance Criteria

• Implemented /api/leads POST route
• Database payload sanitization avoiding SQL injection
• Integrates Cloudflare Turnstile token validation on server side to combat spam bots
• Returns structured validation errors using Zod schemas