e2edd4b2f1
Records the auth model (Argon2, opaque sessions, Bearer/cookie, email verify/reset behind AuthProvider/Mailer), supersedes the interim X-User-Id note, and adds integrations/ to the backend layout. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Signed-off-by: Justin Paul <justin@jpaul.me>