feat: BreakPilot PWA - Full codebase (clean push without large binaries)

All services: admin-v2, studio-v2, website, ai-compliance-sdk,
consent-service, klausur-service, voice-service, and infrastructure.
Large PDFs and compiled binaries excluded via .gitignore.

klausur-service/backend/storage.py

@@ -0,0 +1,61 @@
+"""
+Klausur-Service In-Memory Storage
+
+Centralized storage for all in-memory data.
+Note: In production, this should be replaced with a database.
+"""
+
+from typing import Dict, List
+
+from models.exam import Klausur, StudentKlausur
+from models.grading import AuditLogEntry
+from models.eh import (
+    Erwartungshorizont,
+    EHRightsConfirmation,
+    EHAuditLogEntry,
+    EHKeyShare,
+    EHKlausurLink,
+    EHShareInvitation,
+)
+
+# =============================================
+# KLAUSUR STORAGE
+# =============================================
+
+# Klausur storage: klausur_id -> Klausur
+klausuren_db: Dict[str, Klausur] = {}
+
+# Student work storage: student_id -> StudentKlausur
+students_db: Dict[str, StudentKlausur] = {}
+
+# Examiner assignments: student_id -> examiner info
+examiner_db: Dict[str, Dict] = {}
+
+# =============================================
+# AUDIT LOG STORAGE
+# =============================================
+
+# General audit log
+audit_log_db: List[AuditLogEntry] = []
+
+# =============================================
+# BYOEH STORAGE
+# =============================================
+
+# Erwartungshorizont storage: eh_id -> Erwartungshorizont
+eh_db: Dict[str, Erwartungshorizont] = {}
+
+# Rights confirmations: confirmation_id -> EHRightsConfirmation
+eh_rights_db: Dict[str, EHRightsConfirmation] = {}
+
+# EH audit log
+eh_audit_db: List[EHAuditLogEntry] = []
+
+# Key shares: eh_id -> list of EHKeyShare
+eh_key_shares_db: Dict[str, List[EHKeyShare]] = {}
+
+# EH-Klausur links: klausur_id -> list of EHKlausurLink
+eh_klausur_links_db: Dict[str, List[EHKlausurLink]] = {}
+
+# Share invitations: invitation_id -> EHShareInvitation
+eh_invitations_db: Dict[str, EHShareInvitation] = {}