fix(docs): add telemetry.md to documentation index

[Jah-yee]

Summary

Simple docs fix: adds the missing telemetry.md entry to docs/README.md, which is the documentation index page.

Fix

• docs/README.md: Added link to telemetry.md (anonymous heartbeat documentation)

Closes #1902

Checklist

• Docs only change
• GH007 compliant (noreply email used)
• Single commit

[erni-a]

Thanks @Jah-yee for re-opening with the corrected email. One mechanical blocker before review: the commit has no Signed-off-by trailer, and branch protection requires one on every commit (CONTRIBUTING.md, "Sign-off (DCO)"). git rebase --signoff origin/main && git push --force-with-lease adds it. Ping me when pushed and I will approve the CI run and review the same day.