Add Brand Facts

Adds brand facts to a website's Knowledge Base in bulk (1-50 per call). Every fact runs the full ingestion pipeline — deduplication, approval gates, and pillar routing — and there is no way to force-approve: inputs are declarative (text, optional source URL, optional pillar pin) and the response reports one outcome per fact. Facts without a pillar_id are routed automatically and may land unfiled. Requires a website-admin API key. Also available as the MCP tool add_brand_facts.