feat(landing): metrics, marquee, CTA v2 + nav/footer polish (Phase 5.5 finish)

[xdroberto]

Phase 5.5 — landing redesign · finish (batches 3–5 consolidated)

Builds on batches 1–2 (already in develop). Completes the landing v2 per the operator design. Screenshot-gated + approved by Roberto.

What's in this PR

• Marquee "Trusted by data teams at" — wordmark strip, infinite seamless loop (nvMarquee keyframe + per-item padding so one set = exactly 50%). Static under reduced motion.
• Metrics band — 99.99% / 340ms / 1,200+ KPIs that count up on scroll into view (IntersectionObserver, reduced-motion safe); suffix accents from v2 tokens.
• CTA v2 — glass card with a pulsing glow, "Get started — it's free" + "Talk to sales", disclaimer.
• Nav — full links (Product/Customers/Pricing → section anchors) + brand name; footer v2 (Log in/Sign up/Security/Docs). scroll-padding-top clears the fixed header so anchors land correctly. Fixed a brand-name duplication (NovaLogo already carries the wordmark).
• Sora: display optional + not preloaded so the LCP h1 paints in the metric-matched fallback (Sora swaps in on the cached visit) — keeps LCP off the critical path.
• page order: hero → marquee → features → metrics → cta.

Scope: src/app/(marketing)/** only. No auth / proxy / deploy / CI / scripts touched.

Verification

• tsc --noEmit clean · biome lint clean · next build green.
• Lighthouse mobile: performance 89–90 (operator-accepted — LCP intrinsic to the rich hero under slow-4G simulation; CLS 0, TBT ~40–50ms).
• Landing e2e green (hero CTA → signup; no horizontal overflow @375).

This is the final landing batch — merging + promoting develop → main ships the full v2 to production.

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