feat(site): seo improvements (#7731)

* feat(site): seo improvements

* fix(site): harden SEO metadata and analytics loading

Make metadata generation and inline JSON-LD safer while normalizing configured base URLs and gating analytics scripts on consent. Also remove placeholder Next.js article links and point ORM CTAs at the current Prisma Postgres quickstart.

Made-with: Cursor

* fix(site): harden structured data serialization

Escape inline JSON-LD with Unicode-safe replacements to avoid script parsing issues and update FAQ plain-text normalization to handle doubly encoded entities without reintroducing unsafe general entity decoding.

Made-with: Cursor

Author: mhartington