fix(seo): correct canonical domain to www.mnqeventos.es

mnqcatering.com was never actually registered (WHOIS: no match, no DNS
records) -- it was an intended rename that never happened. The real,
live, registered production domain is www.mnqeventos.es. Every
canonical/OG/schema/sitemap/robots reference and the host-redirect
middleware pointed at the wrong, non-resolving domain; left as-is, the
middleware would have 301'd every real visitor away to a dead host.

Also fixes two schema.org validity issues found during audit:
- '@type': 'CateringService' is not a real schema.org type -- corrected
  to 'CateringBusiness' (LocalBusiness/FoodEstablishment subtype)
- 'serviceType' is a Service property, not valid on LocalBusiness --
  restructured as makesOffer -> Offer -> itemOffered Service entities
- telephone normalized to E.164 in the schema block

astro.config.mjs

@@ -3,7 +3,7 @@ import node from '@astrojs/node';
 import sitemap from '@astrojs/sitemap';
 
 export default defineConfig({
-  site: 'https://www.mnqcatering.com',
+  site: 'https://www.mnqeventos.es',
   output: 'server',
   adapter: node({
     mode: 'standalone',