fix: harden LLM docs worker handover checks

[dirvine]

Summary

• fix the machine-readable Who We Are links to point at the served Markdown path
• restrict Worker GitHub proxying to GET/HEAD and add method coverage tests
• run the full Worker check suite in manual preview/production deploy workflows before deploying

Verification

• npm run check
• python3 scripts/adr-governance.py

Raised after Hermes review of repo maintainability and handover readiness.

[JimCollinson]

Thanks, this looks directionally good.

One requested tweak before merge: overview.md still links [Who We Are](/who-we-are). Since this PR updates the machine-readable indexes to use https://autonomi.com/who-we-are.md, can you update overview.md to link to /who-we-are.md as well?

On the Worker method change: I’m comfortable treating the GET/HEAD-only proxying as implementation hardening, not a new ADR, as long as we’re explicit that non-GET/HEAD requests are outside the docs-serving contract and intentionally fall through.

[JimCollinson]

Made those small tweaks!