feat(blog): publish "Our freelancer directory opens on 1 December. Help us get the signup right"

Adds the soft-launch news post (pipeline record id=128, category News) as
blog/posts/freelancer-directory-soft-launch.html. Body pasted verbatim from
the inbox source block (sha256 14f61402…, byte-identical in the page).

- chrome copied from blog/posts/odoo-20-is-live-on-our-servers-here-is-what-changed.html
  (the newest post); inline <style> trimmed of the rules this page does not use
  (ul/ol, li, figure, figure img, figcaption) — the body carries no list or figure
- card/OG image wired additively: img.post-image (alt = the page h1), og:image,
  twitter:card, and the new blog/index.json "image" key
- BlogPosting JSON-LD with url == canonical
- blog/index.json: one entry, first, key order id,date,area,headline,teaser,link,image
  (text splice, not json.dumps)
- sitemap.xml: one <url>, first in the blog group, lastmod 2026-11-04
- llms.txt: one line at the top of the blog list
- work/verify-html.py FILES extended with the new page

Blog stays English-only. No older post touched.

blog/index.json

@@ -1,5 +1,14 @@
 {
   "posts": [
+    {
+      "id": "freelancer-directory-soft-launch",
+      "date": "2026-11-04",
+      "area": "news",
+      "headline": "Our freelancer directory opens on 1 December. Help us get the signup right",
+      "teaser": "We need your help! We are opening our Odoo Community Freelancer directory on 1 December. Before real clients start brows",
+      "link": "blog/posts/freelancer-directory-soft-launch.html",
+      "image": "https://image.office.odoo4projects.com/img/freelance_platform.png"
+    },
     {
       "id": "odoo-20-is-live-on-our-servers-here-is-what-changed",
       "date": "2026-11-03",