feat(admin): add /api/admin/health endpoint for service status checks

Create server-side health check API that probes actual compliance services
(Backend, AI SDK, Ollama, TTS, Embedding, RAG, Qdrant, Valkey, MinIO)
from within the Docker network. Replaces the non-existent endpoint that
caused all services to show as offline. Also updates ServiceStatus
component to list compliance-relevant services instead of lehrer services.

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

admin-compliance/components/common/ServiceStatus.tsx

@@ -13,16 +13,13 @@ interface ServiceHealth {
 
 // Initial services list for loading state
 const INITIAL_SERVICES: Omit<ServiceHealth, 'status' | 'responseTime' | 'details'>[] = [
-  { name: 'Backend API', port: 8000, category: 'core' },
+  { name: 'Backend API', port: 8002, category: 'core' },
+  { name: 'AI Compliance SDK', port: 8093, category: 'core' },
   { name: 'Consent Service', port: 8081, category: 'core' },
-  { name: 'Voice Service', port: 8091, category: 'core' },
-  { name: 'Klausur Service', port: 8086, category: 'core' },
-  { name: 'Mail Service (Mailpit)', port: 8025, category: 'core' },
-  { name: 'Edu Search', port: 8088, category: 'core' },
-  { name: 'H5P Service', port: 8092, category: 'core' },
+  { name: 'TTS Service', port: 8095, category: 'core' },
   { name: 'Ollama/LLM', port: 11434, category: 'ai' },
   { name: 'Embedding Service', port: 8087, category: 'ai' },
-  { name: 'PostgreSQL', port: 5432, category: 'database' },
+  { name: 'RAG Service', port: 8089, category: 'ai' },
   { name: 'Qdrant (Vector DB)', port: 6333, category: 'database' },
   { name: 'Valkey (Cache)', port: 6379, category: 'database' },
   { name: 'MinIO (S3)', port: 9000, category: 'storage' },