fix: Restore all files lost during destructive rebase

A previous `git pull --rebase origin main` dropped 177 local commits,
losing 3400+ files across admin-v2, backend, studio-v2, website,
klausur-service, and many other services. The partial restore attempt
(660295e2) only recovered some files.

This commit restores all missing files from pre-rebase ref 98933f5e
while preserving post-rebase additions (night-scheduler, night-mode UI,
NightModeWidget dashboard integration).

Restored features include:
- AI Module Sidebar (FAB), OCR Labeling, OCR Compare
- GPU Dashboard, RAG Pipeline, Magic Help
- Klausur-Korrektur (8 files), Abitur-Archiv (5+ files)
- Companion, Zeugnisse-Crawler, Screen Flow
- Full backend, studio-v2, website, klausur-service
- All compliance SDKs, agent-core, voice-service
- CI/CD configs, documentation, scripts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

voice-service/requirements.txt

@@ -0,0 +1,43 @@
+# FastAPI Framework
+fastapi==0.115.0
+uvicorn[standard]==0.30.6
+python-multipart==0.0.9
+websockets==12.0
+
+# Database & Cache
+asyncpg==0.29.0
+sqlalchemy[asyncio]>=2.0.30,<3.0.0
+redis==5.0.1
+
+# Audio Processing (Mimi Codec compatible)
+numpy==1.26.4
+soundfile==0.12.1
+
+# Encryption (Client-side key management)
+cryptography==42.0.8
+pynacl==1.5.0
+
+# HTTP Client (for Ollama/PersonaPlex)
+httpx==0.27.0
+aiohttp==3.10.4
+
+# Validation & Settings
+pydantic==2.8.2
+pydantic-settings==2.4.0
+python-dotenv==1.0.1
+
+# Authentication
+python-jose[cryptography]==3.3.0
+passlib[bcrypt]==1.7.4
+
+# Utilities
+orjson==3.10.6
+structlog==24.4.0
+
+# Testing
+pytest==8.3.2
+pytest-asyncio==0.23.8
+pytest-cov==4.1.0
+
+# BQAS (Quality Assurance)
+pyyaml==6.0.1