Update copy to post-July-2026 reality and notify on signups

- Rewrite copy from "this will happen" to "this has happened": direct
  registration closed 1 July 2026, transition ends 30 June 2028
- Fix timeline (30 June 2028, not 1 July), update FAQ + JSON-LD, add FAQ
  on registering new domains now
- Send signup notification mail to henrik@i80.dk via smtp.i80.dk, with
  credentials from Consul KV
- Fix CI health check URL (punktfri.dk)

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

static/sitemap.xml

@@ -2,7 +2,7 @@
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
     <loc>https://punktfri.dk/</loc>
-    <lastmod>2026-05-22</lastmod>
+    <lastmod>2026-09-19</lastmod>
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>
   </url>

static/style.css

@@ -824,6 +824,11 @@ footer {
     box-shadow: 0 0 0 4px var(--primary-bg);
 }
 
+.timeline-marker.is-past {
+    background: var(--border);
+    border-color: var(--border);
+}
+
 .timeline-marker.is-future {
     background: var(--white);
     border-color: var(--border);