refactor(backend/api): extract LegalDocumentConsentService (Step 4 — file 12 of 18)

Extract consent, audit log, cookie category, and consent stats endpoints
from legal_document_routes into LegalDocumentConsentService. The route
file is now a thin handler layer delegating to LegalDocumentService and
LegalDocumentConsentService with translate_domain_errors(). Legacy
helpers (_doc_to_response, _version_to_response, _transition,
_log_approval) and schemas are re-exported for existing tests. Two
transition tests updated to expect domain errors instead of HTTPException.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend-compliance/compliance/schemas/legal_document.py

@@ -0,0 +1,121 @@
+"""
+Legal document schemas — Rechtliche Texte with versioning + approval.
+
+Phase 1 Step 4: extracted from ``compliance.api.legal_document_routes``.
+"""
+
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel
+
+
+class DocumentCreate(BaseModel):
+    type: str
+    name: str
+    description: Optional[str] = None
+    mandatory: bool = False
+    tenant_id: Optional[str] = None
+
+
+class DocumentResponse(BaseModel):
+    id: str
+    tenant_id: Optional[str]
+    type: str
+    name: str
+    description: Optional[str]
+    mandatory: bool
+    created_at: datetime
+    updated_at: Optional[datetime]
+
+
+class VersionCreate(BaseModel):
+    document_id: str
+    version: str
+    language: str = "de"
+    title: str
+    content: str
+    summary: Optional[str] = None
+    created_by: Optional[str] = None
+
+
+class VersionUpdate(BaseModel):
+    title: Optional[str] = None
+    content: Optional[str] = None
+    summary: Optional[str] = None
+    version: Optional[str] = None
+    language: Optional[str] = None
+
+
+class VersionResponse(BaseModel):
+    id: str
+    document_id: str
+    version: str
+    language: str
+    title: str
+    content: str
+    summary: Optional[str]
+    status: str
+    created_by: Optional[str]
+    approved_by: Optional[str]
+    approved_at: Optional[datetime]
+    rejection_reason: Optional[str]
+    created_at: datetime
+    updated_at: Optional[datetime]
+
+
+class ApprovalHistoryEntry(BaseModel):
+    id: str
+    version_id: str
+    action: str
+    approver: Optional[str]
+    comment: Optional[str]
+    created_at: datetime
+
+
+class ActionRequest(BaseModel):
+    approver: Optional[str] = None
+    comment: Optional[str] = None
+
+
+class UserConsentCreate(BaseModel):
+    user_id: str
+    document_id: str
+    document_version_id: Optional[str] = None
+    document_type: str
+    consented: bool = True
+    ip_address: Optional[str] = None
+    user_agent: Optional[str] = None
+
+
+class CookieCategoryCreate(BaseModel):
+    name_de: str
+    name_en: Optional[str] = None
+    description_de: Optional[str] = None
+    description_en: Optional[str] = None
+    is_required: bool = False
+    sort_order: int = 0
+
+
+class CookieCategoryUpdate(BaseModel):
+    name_de: Optional[str] = None
+    name_en: Optional[str] = None
+    description_de: Optional[str] = None
+    description_en: Optional[str] = None
+    is_required: Optional[bool] = None
+    sort_order: Optional[int] = None
+    is_active: Optional[bool] = None
+
+
+__all__ = [
+    "DocumentCreate",
+    "DocumentResponse",
+    "VersionCreate",
+    "VersionUpdate",
+    "VersionResponse",
+    "ApprovalHistoryEntry",
+    "ActionRequest",
+    "UserConsentCreate",
+    "CookieCategoryCreate",
+    "CookieCategoryUpdate",
+]