Kiro pricing change detected: floor $20 → $0/mo

Detected automatically from the vendor pricing page. Kiro offers a free tier with 50 credits and paid individual plans: Pro for $20/month (1,000 credits), Pro+ for $40/month (2,000 credits), Pro Max for $100/month (5,000 credits), and Power for $200/month (10,000 credits), with add-on credits available at $0.04 each. Pending human verification (needs_review).