ops(nanoclaude): startup self-check for Document Server env vars

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

nanoclaude/main.py

@@ -33,6 +33,12 @@ async def lifespan(app: FastAPI):
             logging.getLogger(__name__).info("Cleaned up %d old conversation messages", deleted)
     except Exception:
         pass
+    # Document Server 연동 상태 확인
+    logger = logging.getLogger(__name__)
+    if not settings.document_api_url:
+        logger.warning("DOCUMENT_API_URL not set — document tool disabled")
+    if not settings.document_api_token:
+        logger.warning("DOCUMENT_API_TOKEN not set — document API calls will be unauthenticated")
     backend_registry.init_from_settings(settings)
     backend_registry.start_health_loop(settings.health_check_interval)
     jq_module.init_queue(settings.max_concurrent_jobs)