feat(sdk): Multi-Tenancy, Versionierung, Change-Requests, Dokumentengenerierung (Phase 1-6)

6-Phasen-Implementation fuer cloud-faehiges, mandantenfaehiges Compliance SDK:

Phase 1: Multi-Tenancy Fix
- Shared tenant_utils.py Dependency (UUID-Validierung, kein "default" mehr)
- VVT tenant_id Column + tenant-scoped Queries
- DSFA/Vendor DEFAULT_TENANT_ID von "default" auf UUID migriert
- Migration 035

Phase 2: Stammdaten-Erweiterung
- Company Profile um JSONB-Felder erweitert (processing_systems, ai_systems, technical_contacts)
- Regulierungs-Flags (NIS2, AI Act, ISO 27001)
- GET /template-context Endpoint
- Migration 036

Phase 3: Dokument-Versionierung
- 5 Versions-Tabellen (DSFA, VVT, TOM, Loeschfristen, Obligations)
- Shared versioning_utils.py Helper
- /{id}/versions Endpoints auf allen 5 Dokumenttypen
- Migration 037

Phase 4: Change-Request System
- Zentrale CR-Inbox mit CRUD + Accept/Reject/Edit Workflow
- Regelbasierte CR-Engine (VVT DPIA → DSFA CR, Datenkategorien → Loeschfristen CR)
- Audit-Trail
- Migration 038

Phase 5: Dokumentengenerierung
- 5 Template-Generatoren (DSFA, VVT, TOM, Loeschfristen, Obligations)
- Preview + Apply Endpoints (erzeugt CRs, keine direkten Dokumente)

Phase 6: Frontend-Integration
- Change-Request Inbox Page mit Stats, Filtern, Modals
- VersionHistory Timeline-Komponente
- SDKSidebar CR-Badge (60s Polling)
- Company Profile: 2 neue Wizard-Steps + "Dokumente generieren" CTA

Docs: 5 neue MkDocs-Seiten, CLAUDE.md aktualisiert
Tests: 97 neue Tests (alle bestanden)

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

backend-compliance/migrations/037_document_versions.sql

@@ -0,0 +1,141 @@
+-- Migration 037: Document Versioning Tables
+-- Separate version tables for DSFA, VVT, TOM, Loeschfristen, Obligations
+-- Pattern: snapshot JSONB + status workflow + audit trail
+
+BEGIN;
+
+-- ============================================================================
+-- 1. Add current_version column to all 5 document tables
+-- ============================================================================
+
+ALTER TABLE compliance_dsfas
+    ADD COLUMN IF NOT EXISTS current_version INTEGER DEFAULT 0;
+
+ALTER TABLE compliance_vvt_activities
+    ADD COLUMN IF NOT EXISTS current_version INTEGER DEFAULT 0;
+
+ALTER TABLE compliance_tom_measures
+    ADD COLUMN IF NOT EXISTS current_version INTEGER DEFAULT 0;
+
+ALTER TABLE compliance_loeschfristen
+    ADD COLUMN IF NOT EXISTS current_version INTEGER DEFAULT 0;
+
+ALTER TABLE compliance_obligations
+    ADD COLUMN IF NOT EXISTS current_version INTEGER DEFAULT 0;
+
+-- ============================================================================
+-- 2. DSFA Versions
+-- ============================================================================
+
+CREATE TABLE IF NOT EXISTS compliance_dsfa_versions (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    dsfa_id UUID NOT NULL,
+    tenant_id VARCHAR(255) NOT NULL,
+    version_number INTEGER NOT NULL,
+    status VARCHAR(20) DEFAULT 'draft',
+    snapshot JSONB NOT NULL,
+    change_summary TEXT,
+    changed_sections JSONB DEFAULT '[]'::jsonb,
+    created_by VARCHAR(200) DEFAULT 'system',
+    approved_by VARCHAR(200),
+    approved_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+    UNIQUE (dsfa_id, version_number)
+);
+
+CREATE INDEX IF NOT EXISTS idx_dsfa_versions_dsfa ON compliance_dsfa_versions(dsfa_id);
+CREATE INDEX IF NOT EXISTS idx_dsfa_versions_tenant ON compliance_dsfa_versions(tenant_id);
+
+-- ============================================================================
+-- 3. VVT Activity Versions
+-- ============================================================================
+
+CREATE TABLE IF NOT EXISTS compliance_vvt_activity_versions (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    activity_id UUID NOT NULL,
+    tenant_id VARCHAR(255) NOT NULL,
+    version_number INTEGER NOT NULL,
+    status VARCHAR(20) DEFAULT 'draft',
+    snapshot JSONB NOT NULL,
+    change_summary TEXT,
+    changed_sections JSONB DEFAULT '[]'::jsonb,
+    created_by VARCHAR(200) DEFAULT 'system',
+    approved_by VARCHAR(200),
+    approved_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+    UNIQUE (activity_id, version_number)
+);
+
+CREATE INDEX IF NOT EXISTS idx_vvt_activity_versions_activity ON compliance_vvt_activity_versions(activity_id);
+CREATE INDEX IF NOT EXISTS idx_vvt_activity_versions_tenant ON compliance_vvt_activity_versions(tenant_id);
+
+-- ============================================================================
+-- 4. TOM Versions
+-- ============================================================================
+
+CREATE TABLE IF NOT EXISTS compliance_tom_versions (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    measure_id UUID NOT NULL,
+    tenant_id VARCHAR(255) NOT NULL,
+    version_number INTEGER NOT NULL,
+    status VARCHAR(20) DEFAULT 'draft',
+    snapshot JSONB NOT NULL,
+    change_summary TEXT,
+    changed_sections JSONB DEFAULT '[]'::jsonb,
+    created_by VARCHAR(200) DEFAULT 'system',
+    approved_by VARCHAR(200),
+    approved_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+    UNIQUE (measure_id, version_number)
+);
+
+CREATE INDEX IF NOT EXISTS idx_tom_versions_measure ON compliance_tom_versions(measure_id);
+CREATE INDEX IF NOT EXISTS idx_tom_versions_tenant ON compliance_tom_versions(tenant_id);
+
+-- ============================================================================
+-- 5. Loeschfristen Versions
+-- ============================================================================
+
+CREATE TABLE IF NOT EXISTS compliance_loeschfristen_versions (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    policy_id UUID NOT NULL,
+    tenant_id VARCHAR(255) NOT NULL,
+    version_number INTEGER NOT NULL,
+    status VARCHAR(20) DEFAULT 'draft',
+    snapshot JSONB NOT NULL,
+    change_summary TEXT,
+    changed_sections JSONB DEFAULT '[]'::jsonb,
+    created_by VARCHAR(200) DEFAULT 'system',
+    approved_by VARCHAR(200),
+    approved_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+    UNIQUE (policy_id, version_number)
+);
+
+CREATE INDEX IF NOT EXISTS idx_loeschfristen_versions_policy ON compliance_loeschfristen_versions(policy_id);
+CREATE INDEX IF NOT EXISTS idx_loeschfristen_versions_tenant ON compliance_loeschfristen_versions(tenant_id);
+
+-- ============================================================================
+-- 6. Obligation Versions
+-- ============================================================================
+
+CREATE TABLE IF NOT EXISTS compliance_obligation_versions (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    obligation_id UUID NOT NULL,
+    tenant_id VARCHAR(255) NOT NULL,
+    version_number INTEGER NOT NULL,
+    status VARCHAR(20) DEFAULT 'draft',
+    snapshot JSONB NOT NULL,
+    change_summary TEXT,
+    changed_sections JSONB DEFAULT '[]'::jsonb,
+    created_by VARCHAR(200) DEFAULT 'system',
+    approved_by VARCHAR(200),
+    approved_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ DEFAULT NOW(),
+    UNIQUE (obligation_id, version_number)
+);
+
+CREATE INDEX IF NOT EXISTS idx_obligation_versions_obligation ON compliance_obligation_versions(obligation_id);
+CREATE INDEX IF NOT EXISTS idx_obligation_versions_tenant ON compliance_obligation_versions(tenant_id);
+
+COMMIT;