- Rewrite system-architecture.md with new 3-project diagram
- Update index.md with Core services table and nginx routing
- Replace service docs that moved to lehrer/compliance with redirects
(klausur-service, voice-service, agent-core, ki-daten-pipeline -> lehrer)
(ai-compliance-sdk -> compliance)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>