Upgrade this repository to Digital Karma Constellation v7.1.

Target site: replace the example.com values first.
Use v7.1-DigitalKarma.md as the controlling installer brief.
Preserve existing production behavior and content.
Add or update the six required constellation artifacts:
- /ai/manifest.json
- /ai/health.json
- /ai/catalog.json
- /ai/karma.json
- /ai/federation.json
- /llm.txt

Keep these discovery files at the root:
- /robots.txt
- /sitemap.xml

Set federation_version to "7.1" wherever it appears, validate JSON, use absolute URLs for discovery endpoints, and add at least one federation relationship.
After implementation, audit the public deployment at https://www.digitalkarmaweb.com/federation-audit.