release: 1.17.2 — ship GEO README to npm

[alloevil]

Docs-only patch release: ship the GEO README to npm

The published npm @alloevil/agent-xray@1.17.1 (2026-09-07) predates the SEO/GEO
README restructure, which merged in #39 on 2026-09-08. npm only refreshes a
package's README when a new version is published, so npmjs.com / npm.io still
serve the old README (npm.io ranks #3 for a descriptive AgentXRay query — high
value to get the good README there).

No code changes. Only package.json version 1.17.1 → 1.17.2.

The README already carries the restructured sections that this release exists to
publish: ## What it is, ## When to use it, ## When NOT to use it,
## Install, ## FAQ. The npm README is the repo README.md at pack time
(files includes README.md; no build step rewrites it).

How to publish after merge

A release-triggered publish workflow already automates publishing
(.github/workflows/publish.yml, on: release: types: [published] → npm ci
→ pack → build provenance → npm publish --provenance --access public). It also
builds frontend/dist in CI via the prepare script, so nothing needs building
locally. Creating the GitHub Release both creates the tag and fires the workflow:

git checkout master && git pull
gh release create v1.17.2 --title v1.17.2 --generate-notes

Prerequisite: the NPM_TOKEN repo secret (already referenced by the
workflow). Publishing runs in CI with a token, so there is no interactive 2FA/OTP
prompt. No manual npm publish is needed.

Do not merge yet — publishing is the maintainer's step.