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/models/__init__.py

@@ -0,0 +1,74 @@
+"""
+Klausur-Service Models
+
+Data models for exams, students, grading, and Erwartungshorizont.
+"""
+
+from .enums import KlausurModus, StudentKlausurStatus, EHStatus
+from .exam import Klausur, StudentKlausur
+from .grading import AuditLogEntry, GRADE_THRESHOLDS, GRADE_LABELS, DEFAULT_CRITERIA
+from .eh import (
+    Erwartungshorizont,
+    EHRightsConfirmation,
+    EHAuditLogEntry,
+    EHKeyShare,
+    EHKlausurLink,
+    EHShareInvitation,
+)
+from .requests import (
+    KlausurCreate,
+    KlausurUpdate,
+    StudentUpload,
+    CriterionScoreUpdate,
+    GutachtenUpdate,
+    ExaminerAssignment,
+    ExaminerResult,
+    GutachtenGenerateRequest,
+    EHMetadata,
+    EHUploadMetadata,
+    EHRAGQuery,
+    EHIndexRequest,
+    EHShareRequest,
+    EHLinkKlausurRequest,
+    EHInviteRequest,
+    EHAcceptInviteRequest,
+)
+
+__all__ = [
+    # Enums
+    "KlausurModus",
+    "StudentKlausurStatus",
+    "EHStatus",
+    # Exam Models
+    "Klausur",
+    "StudentKlausur",
+    # Grading
+    "AuditLogEntry",
+    "GRADE_THRESHOLDS",
+    "GRADE_LABELS",
+    "DEFAULT_CRITERIA",
+    # EH Models
+    "Erwartungshorizont",
+    "EHRightsConfirmation",
+    "EHAuditLogEntry",
+    "EHKeyShare",
+    "EHKlausurLink",
+    "EHShareInvitation",
+    # Request Models
+    "KlausurCreate",
+    "KlausurUpdate",
+    "StudentUpload",
+    "CriterionScoreUpdate",
+    "GutachtenUpdate",
+    "ExaminerAssignment",
+    "ExaminerResult",
+    "GutachtenGenerateRequest",
+    "EHMetadata",
+    "EHUploadMetadata",
+    "EHRAGQuery",
+    "EHIndexRequest",
+    "EHShareRequest",
+    "EHLinkKlausurRequest",
+    "EHInviteRequest",
+    "EHAcceptInviteRequest",
+]