Kiro pricing change detected: typical $40 → $20/mo, floor $20 → $0/mo

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