Created issues #11-#31 for the remaining backlog (VP9 retry, ThreadNet-Web
build bug, MAS template link, WAF, and 17 security/infra hardening items),
plus #13 for the previously-noted MAS custom-template idea. Removed/marked
done the stale checklist items that no longer reflected reality (Authentik
Stage 2/E2E-test/invite-links, Hetzner firewall, SSH hardening - all
already completed weeks ago). TASKS.md's detailed backlog section now
points to Gitea issues as the single source of truth instead of
duplicating tracking in two places.