v0.13.16: @newsroom.writer: the sgit.ai sites in numbers, and how they are named

Two new articles, and an update:

• The sgit.ai sites in numbers. All 53 website repositories counted on 21 October 2026: 45 live sites, 1,679 commits, 5,419 pages, growth in bursts and a long tail, with four charts.
• Plural for the family, singular for the site. Why the AWS site is aws.twin.sgit.ai, the naming rule for every family of sites, the hosts that break it, what changes on twins.sgit.ai and providers.sgit.ai, and a correction: on GitHub Pages no wildcard certificate is needed.
• AWS from the vault now uses aws.twin.sgit.ai and describes the twin-first design.