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>

admin-compliance/components/sdk/Sidebar/SDKSidebar.tsx

@@ -342,6 +342,25 @@ function CorpusStalenessInfo({ ragCorpusStatus }: { ragCorpusStatus: RAGCorpusSt
 export function SDKSidebar({ collapsed = false, onCollapsedChange }: SDKSidebarProps) {
   const pathname = usePathname()
   const { state, packageCompletion, completionPercentage, getCheckpointStatus } = useSDK()
+  const [pendingCRCount, setPendingCRCount] = React.useState(0)
+
+  // Poll pending change-request count every 60s
+  React.useEffect(() => {
+    let active = true
+    async function fetchCRCount() {
+      try {
+        const res = await fetch('/api/sdk/v1/compliance/change-requests/stats')
+        if (res.ok) {
+          const data = await res.json()
+          if (active) setPendingCRCount(data.total_pending || 0)
+        }
+      } catch { /* ignore */ }
+    }
+    fetchCRCount()
+    const interval = setInterval(fetchCRCount, 60000)
+    return () => { active = false; clearInterval(interval) }
+  }, [])
+
   const [expandedPackages, setExpandedPackages] = React.useState<Record<SDKPackageId, boolean>>({
     'vorbereitung': true,
     'analyse': false,
@@ -695,6 +714,35 @@ export function SDKSidebar({ collapsed = false, onCollapsedChange }: SDKSidebarP
             isActive={pathname === '/sdk/catalog-manager'}
             collapsed={collapsed}
           />
+          <Link
+            href="/sdk/change-requests"
+            className={`flex items-center gap-3 px-4 py-2.5 text-sm transition-colors ${
+              collapsed ? 'justify-center' : ''
+            } ${
+              pathname === '/sdk/change-requests'
+                ? 'bg-purple-100 text-purple-900 font-medium'
+                : 'text-gray-600 hover:bg-gray-50 hover:text-gray-900'
+            }`}
+            title={collapsed ? `Änderungsanfragen (${pendingCRCount})` : undefined}
+          >
+            <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2}
+                d="M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-3 7h3m-3 4h3m-6-4h.01M9 16h.01" />
+            </svg>
+            {!collapsed && (
+              <span className="flex items-center gap-2">
+                Änderungsanfragen
+                {pendingCRCount > 0 && (
+                  <span className="px-1.5 py-0.5 text-xs font-bold bg-red-500 text-white rounded-full min-w-[1.25rem] text-center">
+                    {pendingCRCount}
+                  </span>
+                )}
+              </span>
+            )}
+            {collapsed && pendingCRCount > 0 && (
+              <span className="absolute top-1 right-1 w-2 h-2 bg-red-500 rounded-full" />
+            )}
+          </Link>
           <AdditionalModuleItem
             href="https://macmini:3006"
             icon={