SEO: pricing-rich service schema, AggregateRating, tighter meta

- Service pages now include AggregateOffer in JSON-LD (priceCurrency
  NZD, lowPrice/highPrice/offerCount derived from each service's
  pricing.plans). Unlocks price-rich SERP results.
- Homepage LocalBusiness schema now includes AggregateRating and
  per-testimonial Review entries (5 stars, n reviews). Eligible for
  star ratings in SERPs.
- Puppy Visits meta description rewritten — was 241 chars opening
  with "Puppy Visits Introducing Puppy Visits..." Now a tight 144
  chars with Auckland keyword.
- Removed the dead /about-us static-pages entry; the 301 redirect
  in [slug]/+page.server.ts already routes it to /about, so the
  duplicate metadata was unreachable. Pruned matching dead branches
  in [slug]/+page.svelte and RouteSkeleton.svelte for clarity.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/lib/components/RouteSkeleton.svelte

@@ -13,7 +13,7 @@
   function getVariant(path: string) {
     if (path === '/') return 'home';
     if (serviceRoutes.has(path)) return 'service';
-    if (path === '/about' || path === '/about-us') return 'about';
+    if (path === '/about') return 'about';
     if (path === '/our-pricing') return 'pricing';
     if (path === '/contact-us') return 'contact';
     if (legalRoutes.has(path)) return 'legal';