Initial commit: breakpilot-lehrer - Lehrer KI Platform

Services: Admin-Lehrer, Backend-Lehrer, Studio v2, Website,
Klausur-Service, School-Service, Voice-Service, Geo-Service,
BreakPilot Drive, Agent-Core

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

backend-lehrer/classroom/services/__init__.py

@@ -0,0 +1,23 @@
+"""
+Classroom Services Package
+"""
+
+from .persistence import (
+    init_db_if_needed,
+    load_active_sessions_from_db,
+    persist_session,
+    get_session_or_404,
+    DB_ENABLED,
+    sessions,
+    SessionLocal,
+)
+
+__all__ = [
+    "init_db_if_needed",
+    "load_active_sessions_from_db",
+    "persist_session",
+    "get_session_or_404",
+    "DB_ENABLED",
+    "sessions",
+    "SessionLocal",
+]