fix(claims): purge false tier claims from landing, billing cards and legal docs

The false RBAC / 99.9 SLA / BYOC / custom-domain claims were not only on /pricing but also on the landing-page tier cards, the in-app billing upgrade cards, and — most seriously — the AGB and Terms as a binding 99.9 monthly uptime SLA the single-host infra cannot meet. Aligned all of them: SLA removed from AGB/Terms (best-effort, no guaranteed SLA for self-serve; Enterprise by contract); landing+billing cards now show Audit log, RBAC coming-soon, custom-domain coming-soon, honest Enterprise infra; landing Team price corrected 149->199; billing cards model name Haiku/Sonnet -> Claude AI. Privacy page intentionally keeps exact model names for data-residency disclosure.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/web/app/(marketing)/terms/page.tsx

@@ -26,7 +26,7 @@ const SECTIONS = [
   },
   {
     h: '5. Service availability',
-    p: 'Free and Pro plans are best-effort. Team plan carries a 99.9% monthly uptime SLA with service credits as the sole remedy. Enterprise SLAs are negotiated separately.',
+    p: 'Free, Pro and Team plans are provided on a best-effort basis with no guaranteed uptime SLA. Enterprise availability commitments are negotiated separately by contract.',
   },
   {
     h: '6. Billing',