FRD-1556: Add UTM links for npm and GitHub SDK docs

[kathinaios]

Summary

• Add static UTM query params to Bespot product links in README.md, docs/integration-guide.md, and docs/authentication.md so GA can attribute traffic from the public SDK package and GitHub docs.
• Keep one tagged signup CTA per README / integration guide (duplicate signup hrefs removed or plain-text).
• Leave API example URLs, badges, and third-party links untagged.
• No source-repo (gatekeeper-web-sdk) changes — marketing links live only in this release repo; npm ships README but not docs/.

UTM taxonomy

Param	Values
utm_source	readme | integration | authentication
utm_medium	signup | docs-home | docs-auth
utm_campaign	gatekeeper-web-sdk
utm_content	see inventory below

Note: README is shared by npm and GitHub, so utm_source=readme does not split host; use GA referrer if that distinction is needed. docs/* links are GitHub-only.

UTM link inventory

Location	Position	Destination	utm_source	utm_medium	utm_campaign	utm_content
README.md:21	Prerequisites › Signup	gatekeeper.bespot.com	readme	signup	gatekeeper-web-sdk	readme-signup
README.md:25	Documentation › Docs home	docs.bespot.com	readme	docs-home	gatekeeper-web-sdk	readme-docs-home
README.md:35	Documentation › Docs auth	docs.bespot.com/api/auth	readme	docs-auth	gatekeeper-web-sdk	readme-docs-auth
docs/integration-guide.md:54	Bespot prerequisites › Signup	gatekeeper.bespot.com	integration	signup	gatekeeper-web-sdk	integration-signup
docs/integration-guide.md:60	Bespot prerequisites › Docs home	docs.bespot.com	integration	docs-home	gatekeeper-web-sdk	integration-docs-home
docs/integration-guide.md:643	Support › Docs auth	docs.bespot.com/api/auth	integration	docs-auth	gatekeeper-web-sdk	integration-docs-auth
docs/authentication.md:9	Official reference › Docs home	docs.bespot.com	authentication	docs-home	gatekeeper-web-sdk	authentication-docs-home
docs/authentication.md:10	Official reference › Docs auth	docs.bespot.com/api/auth	authentication	docs-auth	gatekeeper-web-sdk	authentication-docs-auth

Test plan

• Spot-check all 8 hrefs render correctly on GitHub
• Confirm npm README preview shows UTM query strings on the three README links
• Click each destination once and confirm GA realtime (or Tag Assistant) receives the expected source/medium/campaign/content
• Confirm gatekeeper.bespotcompany.com example baseUrl strings remain without UTMs
• Confirm Quick start / Account portal no longer use a second signup href

Made with Cursor

[dimdimitros]

LGTM