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>

backend/api/tests/registry/__init__.py

@@ -0,0 +1,129 @@
+"""
+Test Registry Module
+
+Zentrale API fuer das Test-Dashboard.
+Entdeckt, registriert und fuehrt Tests aus allen Services aus.
+
+Phase 1 Update (2026-02-02):
+- PostgreSQL-Integration fuer persistente Speicherung
+- Backlog-Management mit Status-Workflow
+- Historie und Trends ueber Zeit
+
+Modular Refactoring (2026-02-03):
+- Split into sub-modules for maintainability
+"""
+
+# Re-export the router for FastAPI
+from .routes import router
+
+# Re-export config for external access
+from .config import (
+    PROJECT_ROOT,
+    RUN_MODE,
+    DATA_DIR,
+    RESULTS_FILE,
+    check_go_available,
+    check_pytest_available,
+    get_go_version,
+    get_pytest_version,
+    load_persisted_results,
+    save_persisted_results,
+    migrate_json_to_postgres,
+    is_postgres_available,
+    get_persisted_results,
+    get_test_runs,
+    get_current_runs,
+    get_running_tests,
+)
+
+# Re-export API models
+from .api_models import (
+    TestRunRequest,
+    TestRunResponse,
+    RegistryResponse,
+    BacklogStatusUpdate,
+    BacklogPriorityUpdate,
+    FixAttempt,
+    ManualBacklogEntry,
+    CIResultRequest,
+)
+
+# Re-export discovery functions
+from .discovery import (
+    discover_go_tests,
+    discover_python_tests,
+    discover_bqas_tests,
+    build_service_info,
+)
+
+# Re-export executors
+from .executors import (
+    run_go_tests,
+    run_python_tests,
+    run_bqas_tests,
+    run_jest_tests,
+    run_playwright_tests,
+    run_tests_in_container,
+    execute_test_run,
+)
+
+# Re-export services
+from .services import (
+    extract_go_error,
+    classify_go_error,
+    suggest_go_fix,
+    extract_pytest_error,
+    classify_pytest_error,
+    suggest_pytest_fix,
+)
+
+__all__ = [
+    # Router
+    "router",
+    # Config
+    "PROJECT_ROOT",
+    "RUN_MODE",
+    "DATA_DIR",
+    "RESULTS_FILE",
+    "check_go_available",
+    "check_pytest_available",
+    "get_go_version",
+    "get_pytest_version",
+    "load_persisted_results",
+    "save_persisted_results",
+    "migrate_json_to_postgres",
+    "is_postgres_available",
+    "get_persisted_results",
+    "get_test_runs",
+    "get_current_runs",
+    "get_running_tests",
+    # API Models
+    "TestRunRequest",
+    "TestRunResponse",
+    "RegistryResponse",
+    "BacklogStatusUpdate",
+    "BacklogPriorityUpdate",
+    "FixAttempt",
+    "ManualBacklogEntry",
+    "CIResultRequest",
+    # Discovery
+    "discover_go_tests",
+    "discover_python_tests",
+    "discover_bqas_tests",
+    "build_service_info",
+    # Executors
+    "run_go_tests",
+    "run_python_tests",
+    "run_bqas_tests",
+    "run_jest_tests",
+    "run_playwright_tests",
+    "run_tests_in_container",
+    "execute_test_run",
+    # Services
+    "extract_go_error",
+    "classify_go_error",
+    "suggest_go_fix",
+    "extract_pytest_error",
+    "classify_pytest_error",
+    "suggest_pytest_fix",
+]