Marketplace Privacy SEO Pages
- 10 per-marketplace detail pages at /marketplaces/:slug (Poshmark, Depop, Mercari, Grailed, Vinted, etc.)
- Per-marketplace: GPS stats, redacted EXIF examples, Filtrate compliance comparison, CTAs
- 11 new sitemap entries + IndexNow ping; marketplace Audits footer section
- Programmatic SEO surface for "marketplace privacy" long-tail queries