fix(seo): repair the 10 blog canonicals, sitemap.xml, blog/index.json and llms.txt

From seo/out/site-seo-ai-search-audit-2026-10-27.md (§6 items 1, 2, 3a, 5).

- canonical: 10 blog posts declared https://odooprojects.com/... — a live parked
  third-party domain — as their canonical. Now self-referencing on
  https://odoo4projects.com/blog/posts/<slug>.html (1 line each, nothing else).
- sitemap.xml: 27 -> 33 URLs. Added the 6 live pages that were missing
  (support.html, legal.html, community-vs-enterprise-cost, 6-tips,
  odoocommunity-agents, odoo-20-is-live); corrected 13 lastmod values to the
  real last content commit (homepage was 4 months stale); /de/ and /es/
  priority 1.0 -> 0.7 so a translation does not outrank its original.
- blog/index.json: 7 -> 15 posts. The 8 orphan posts are now listed, so every
  post is reachable from the homepage grid.
- llms.txt: removed the link to /blog/ (that URL returns 403) and added a
  "## Blog posts" section listing all 15 posts with date and summary.

Not changed on purpose: FAQPage on support.html, the homepage "price": ">950.00",
the bootcamp start-date conflict, and the blog post chrome (15 files).

llms.txt

@@ -40,7 +40,24 @@
 - [Legal](https://odoo4projects.com/legal.html): company details.
 - [Privacy Policy](https://odoo4projects.com/privacy.html): what data we hold and how we use it.
 - [Terms of Service](https://odoo4projects.com/terms.html): plans, trial, payment and cancellation.
-- [Blog](https://odoo4projects.com/blog/): guides, how-tos and platform news.
+
+## Blog posts
+
+- [ODOO Community Is Going Online on ODOO4projects](https://odoo4projects.com/blog/posts/odoo-community-is-going-online-on-odoo4projects.html) — 2026-10-27 — ODOO Community is online.
+- [Track the OCA Modules You Actually Use — Without Refreshing GitHub Every Day](https://odoo4projects.com/blog/posts/track-the-oca-modules-you-actually-use.html) — 2026-10-24 — Every new Odoo release starts the same routine.
+- [This is how i updated my Invoices from Odoo 19 to Odoo 20 with n8n and much MCP](https://odoo4projects.com/blog/posts/odoo-19-to-20-invoice-migration-with-n8n-and-mcp.html) — 2026-10-23 — Copying invoices from one Odoo instance to another by hand is the kind of task that looks small until you are on…
+- [6 Tips to Leverage the Latest Odoo Management App Update](https://odoo4projects.com/blog/posts/6-tips-to-leverage-the-latest-odoo-management-app-update.html) — 2026-10-08 — We've just rolled out a major update to the management app preinstalled on your ODOO4project service.
+- [Odoo 20 Is Live on Our Servers — With an MCP Server and Free Backups](https://odoo4projects.com/blog/posts/odoo-20-is-live-on-our-servers-with-an-mcp-server-and-free-backups.html) — 2026-10-06 — Two weeks. That is how long it took us to bring up Odoo 20 on our servers, with all of the new features that come with it. It is live now.
+- [Odoo Community vs. Enterprise: The Real Cost Breakdown (2026)](https://odoo4projects.com/blog/posts/community-vs-enterprise-cost.html) — 2026-06-27 — A transparent cost comparison of Odoo Community vs Enterprise — including hosting, licensing, and hidden costs for 5, 10, and 25-user teams.
+- [Platform Update: New Dashboard, Faster Backups & Smarter Monitoring](https://odoo4projects.com/blog/posts/news-platform-update.html) — 2026-06-24 — We've rolled out a major platform update with a redesigned dashboard, incremental backups, and AI-powered uptime monitoring.
+- [Why ODOO Community is Perfect for Working with AI Agents](https://odoo4projects.com/blog/posts/odoocommunity-agents.html) — 2026-06-24 — Odoo Community carries no licensing fees, so each AI agent can have its own user account and access rights without additional cost - a game changer for automation.
+- [How to Migrate from Odoo Community to Enterprise Without Downtime](https://odoo4projects.com/blog/posts/guide-migrate-enterprise.html) — 2026-06-20 — A step-by-step guide to migrating your Odoo CE instance to Enterprise edition with zero downtime and full data integrity.
+- [Install Custom Odoo Modules via Git – A Practical How-To](https://odoo4projects.com/blog/posts/howto-custom-module.html) — 2026-06-17 — Learn how to install and manage custom Odoo modules directly from Git repositories on your ODOO4projects instance.
+- [ODOO4projects Becomes an Official Odoo Ready Partner](https://odoo4projects.com/blog/posts/news-official-partner.html) — 2026-06-14 — We're thrilled to announce our official partnership with Odoo SA, bringing enterprise-grade hosting to even more businesses.
+- [Set Up Automated Backups in Under 2 Minutes](https://odoo4projects.com/blog/posts/speed-run-backup.html) — 2026-06-10 — Protect your Odoo data in moments. This speed-run walks you through enabling automated daily backups with one click.
+- [Build AI-Powered Workflows with Odoo & n8n](https://odoo4projects.com/blog/posts/howto-ai-automation.html) — 2026-06-06 — Connect Odoo to AI services and automate repetitive tasks using n8n workflows. A hands-on guide for busy operators.
+- [Deploy Your First Odoo Instance in 5 Minutes](https://odoo4projects.com/blog/posts/speed-run-deploy.html) — 2026-06-02 — From zero to live Odoo instance in under five minutes. Follow this speed-run and see your business apps running instantly.
+- [Getting Started with Odoo Hosting – What You Need to Know](https://odoo4projects.com/blog/posts/my-first-post.html) — 2026-05-28 — New to Odoo hosting? This guide covers everything from choosing a plan to configuring your first domain and SSL.
 
 ## Notes