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>
