Expand iplib, iptype, and ioc plugins with better caching, throttling,
and lookup logic. Update validation script and showcase journal accordingly.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Centralize provider caching and rate-limit handling, then add Domain/URL/Hash IOC types and safer VT/IPInfo key resolution so lookups stay reliable on free-tier APIs.