Align documentation with current codebase state: add admin blueprint to
client architecture, document dev (Nginx) vs prod (Traefik) compose files,
fix blueprint count in test section.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add dev commands (test, migrations, i18n, Docker), architecture overview,
critical patterns (copy-on-write versioning, pass/fail, SPC, auth flow),
and dependency/configuration reference.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>