feat(agent): migrate compliance-check results to banner + documents (M1-M5)

After a compliance-check run finishes, the user can now apply the
extracted vendor inventory directly to their own:

  - CookieBanner config (admin /sdk/einwilligungen)
  - Cookie-Policy / VVT-Register / Privacy-Policy templates
    (admin /sdk/document-generator)

Backend:
  - migration_to_banner.py: vendor list -> CookieBannerConfig with
    ESSENTIAL/PERFORMANCE/PERSONALIZATION/EXTERNAL_MEDIA buckets +
    review flags (broken opt-out URLs, missing expiry, no cookies listed)
  - migration_to_document.py: vendor list -> pre-fills for 3 doc
    templates, recipient-type aware (INTERNAL/GROUP/PROCESSOR/CONTROLLER)
  - agent_migration_routes.py: GET /banner-preview, /document-preview,
    /summary keyed on check_id
  - compliance_audit_log: new check_payloads table persists cmp_vendors +
    extracted_profile so the preview survives an app restart
  - tests: 9 mapper units + 4 endpoint integration tests

Frontend:
  - MigrationPanel.tsx: modal showing banner-config diff + document
    pre-fills, plus links into the existing editors
  - ComplianceCheckTab.tsx: replaces standalone audit link with the
    panel; net -3 lines, stays at the 500-cap

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

admin-compliance/app/sdk/agent/_components/ComplianceCheckTab.tsx

@@ -3,6 +3,7 @@
 import React, { useState, useCallback } from 'react'
 import { ChecklistView } from './ChecklistView'
 import { DocumentRow } from './DocumentRow'
+import { MigrationPanel } from './MigrationPanel'
 
 const DOCUMENT_TYPES = [
   { id: 'dse', label: 'DSI (Datenschutzinformation)', required: true },
@@ -455,21 +456,14 @@ export function ComplianceCheckTab() {
 
           <ChecklistView results={results.results} />
 
-          {/* Email status + Full-audit link */}
-          <div className="mt-3 flex items-center justify-between gap-3">
-            {results.email_status && (
-              <div className="text-xs text-gray-500 flex items-center gap-2">
-                <span className={`w-2 h-2 rounded-full ${results.email_status === 'sent' ? 'bg-green-400' : 'bg-gray-300'}`} />
-                E-Mail: {results.email_status === 'sent' ? 'Gesendet' : results.email_status}
-              </div>
-            )}
-            {results.check_id && (
-              <a href={`/sdk/agent/audit/${results.check_id}`} target="_blank" rel="noopener"
-                className="text-xs text-blue-700 hover:text-blue-900 underline">
-                Voll-Audit oeffnen (alle MCs) &rarr;
-              </a>
-            )}
-          </div>
+          {/* Email + Migration + Full-audit */}
+          {results.email_status && (
+            <div className="mt-3 text-xs text-gray-500 flex items-center gap-2">
+              <span className={`w-2 h-2 rounded-full ${results.email_status === 'sent' ? 'bg-green-400' : 'bg-gray-300'}`} />
+              E-Mail: {results.email_status === 'sent' ? 'Gesendet' : results.email_status}
+            </div>
+          )}
+          {results.check_id && <MigrationPanel checkId={results.check_id} />}
         </div>
       )}