The widget-only integrations refactor incorrectly removed the
ArchiveTeam Warrior integration entirely. It only needed to be
excluded from auto-seeding (by removing defaultUrl), not deleted.
This restores the integration class, reverts the widget/router/handler
to use integration middleware, and removes archiveTeamWarrior from the
widget-only-integrations migration.
Merging dev introduced the Gotify integration and ArchiveTeam Warrior
widget/integration, which require entries in the doc-slug maps and the
generated documentation sitemap. Also remove a misplaced non-null
assertion in the group members page flagged by oxlint.