L1 servers call this endpoint to verify tokens during auth callback.
Returns user info if token is valid, 401 if invalid or revoked.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Create app factory with routers and templates
- Auth, assets, activities, anchors, storage, users, renderers routers
- Federation router for WebFinger and nodeinfo
- Jinja2 templates for L2 pages
- Config and dependency injection
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>