feat(seo): restore /odoo-n8n-masterclass/ and /workshops/, both 404ing but indexed

Two directory URLs Google still has indexed were 404ing after the old site was
torn down. Both are rebuilt as trailing-slash directories (same model as
/odoo-erp-automation-bootcamp/, so the non-slash form 301s to the slash form).

odoo-n8n-masterclass/index.html
- copy from copywriter, structure and page-scoped CSS reused from the bootcamp page
- next session: four Thursdays of February 2027, 17:00 Central Time (hero eyebrow,
  price and booking, JSON-LD startDate 2027-02-04)
- booking: native POST form to 20.odoo4projects.com/shop/post_basket, basket
  product_id 44, zero JavaScript, three CTAs
- n8n environment corrected: we do not hand out n8n workspaces; the participant
  uses n8n's own free plan. Body, hero fact, FAQ and JSON-LD say so plainly.
- JSON-LD Course + FAQPage; Plausible snippet; FAQ and Buy markings

workshops/index.html
- hub page, two cards (masterclass USD 120.00 / bootcamp USD 465.00), pull quote,
  routing section, FAQ, comparison table
- the bootcamp card carries no term or date; the "ERP Automation Quick Wins" free
  offer is gone entirely (no card, no 1-hour format, no /free-webinar link)
- JSON-LD ItemList; Plausible snippet; FAQ markings

SEO: canonical to the slash URL, OG tags, the bootcamp's font/style.css loading
pattern, sitemap.xml (+2 urls, lastmod 2026-10-28, bootcamp lastmod bumped for the
two links added there), llms.txt (+2 lines). Cross-linked both ways and both to the
bootcamp; the bootcamp page gains the inbound links.

English only. No DE/ES twins yet - translator follow-up.

Checks: verify-html.py 0 problems, check-links.py clean, check-links-2026-10-28.py
56 PASS / 0 FAIL, verify-plausible-events 71 PASS / 0 FAIL, JSON-LD parses.

llms.txt

@@ -34,6 +34,8 @@
 - [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.
+- [ODOO x N8N Masterclass](https://odoo4projects.com/odoo-n8n-masterclass/): a two-hour live masterclass with Oliver Arnold on connecting Odoo to n8n — calling n8n webhooks from Odoo automated actions, how the n8n integration for Odoo works, and website workarounds that extend your automation. Hands-on in a free Odoo trial system; n8n itself runs on n8n's own free plan, which is not included. USD 120.00, next session the four Thursdays of February 2027 at 17:00 Central Time.
+- [ODOO Workshops and Classes](https://odoo4projects.com/workshops/): the two live courses side by side — the two-hour ODOO x N8N Masterclass (USD 120.00) and the ten-session ODOO ERP Automation Bootcamp (USD 465.00), both taught by Oliver Arnold — which course fits which business, and a full comparison table.
 - [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).
 - [Home](https://odoo4projects.com/): plans and pricing, FAQ, server locations.
 - [Support](https://odoo4projects.com/support.html): support and frequently asked questions.