- Add Ollama client library (ollama npm package) - Create LlmService for chat completion and embeddings - Support streaming responses via Server-Sent Events - Add configuration via env vars (OLLAMA_HOST, OLLAMA_TIMEOUT) - Create endpoints: GET /llm/health, GET /llm/models, POST /llm/chat, POST /llm/embed - Replace old OllamaModule with new LlmModule - Add comprehensive tests with >85% coverage Closes #21