fix(isms): Proxy-Pfad /api/isms → /api/compliance/isms

Readiness-Check Button funktionierte nicht weil der ISMS-Proxy
das /compliance Segment im Backend-Pfad fehlte.

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

admin-compliance/app/api/sdk/v1/isms/[[...path]]/route.ts

@@ -14,7 +14,7 @@ async function proxyRequest(
 ) {
   const pathStr = pathSegments?.join('/') || ''
   const searchParams = request.nextUrl.searchParams.toString()
-  const basePath = `${BACKEND_URL}/api/isms`
+  const basePath = `${BACKEND_URL}/api/compliance/isms`
   const url = pathStr
     ? `${basePath}/${pathStr}${searchParams ? `?${searchParams}` : ''}`
     : `${basePath}${searchParams ? `?${searchParams}` : ''}`