feat(site): publish /australia.html — managed Odoo hosting in Australia (Sydney)

New flat landing page for Australian buyers, built from the approved Phase 2
copy with the five buyer-lens changes (R1-R5) applied. English only, no hreflang.

- australia.html: hero, five sections, four-plan pricing table (On the Rise
  heroed), 7-question FAQ, final CTA band; house CI (midnight/brass/cream,
  Marcellus + Inter), page-scoped CSS only.
- Buy CTAs are native POST forms to the live checkout with Australia (Sydney)
  pre-selected (basket product_id 4, verified against the homepage card).
- images/city-sydney.webp: city-sydney.jpg resized 6720x2240 -> 1920x640,
  9.8 MB -> 131 KB.
- index.html: the Sydney server card now links to the new page.
- sitemap.xml + llms.txt: page registered.

Evidence: verify-html.py PROBLEMS 0, verify-australia-page.py PROBLEMS 0,
JSON-LD parses, impeccable detect run (findings recorded).

llms.txt

@@ -30,6 +30,7 @@
 
 ## Key pages
 
+- [Odoo hosting in Australia — Sydney](https://odoo4projects.com/australia.html): managed Odoo Community hosting on our own servers in Sydney, for Australian businesses. The four plans and yearly prices, the checkout with Australia (Sydney) pre-selected, and the one Sydney claim we make — we host in Sydney (no AU support hours, no AU entity, no AUD price published).
 - [Odoo hosting 2027 — comparison landing page](https://odoo4projects.com/odoo-hosting-2027.html): every route to Odoo (managed, VPS, odoo.sh, Odoo Online, own hardware) side by side, with annual and five-year cost comparisons.
 - [Odoo ERP Automation Bootcamp](https://odoo4projects.com/odoo-erp-automation-bootcamp/): a three-month, ten-session live bootcamp with Oliver Arnold, Technical Lead, that takes a small business from zero to a running ERP. Thursdays, one hour, Q1 2026, starting 8 January 2026; one year of hosted Odoo Community Edition included. The current price is confirmed on registration.
 - [A briefing for Andrew](https://odoo4projects.com/odooityourself.html): Odoo Community as a first-class citizen — the vision behind our managed Community hosting, the six regions, the management console, the MCP agent that can touch the server, and the plan prices (Empire quoted per setup).