SEO-to-x402 growth loop shipped

Closed the organic-to-revenue feedback loop: first-touch attribution, the /admin/seo-mrr-loop dashboard correlating page views to settled x402 calls, and a biweekly content-release runbook.
First-touch attribution persisted in browser session and posted on cta_click + x402_settled
/admin/seo-mrr-loop dashboard surfaces channel, landing path, endpoint, and backlog candidates
SEO_MRR_LOOP.md runbook codifies the 40% BOFU / 40% MOFU / 20% TOFU content mix
101 new pSEO seed rows expanded the finance cluster