Clean up instructions and implementation; reorganize notebooks

llama_stack/templates/nvidia/run.yaml

@@ -18,6 +18,7 @@ providers:
     config:
       url: ${env.NVIDIA_BASE_URL:https://integrate.api.nvidia.com}
       api_key: ${env.NVIDIA_API_KEY:}
+      append_api_version: ${env.NVIDIA_APPEND_API_VERSION:True}
   vector_io:
   - provider_id: faiss
     provider_type: inline::faiss
@@ -31,7 +32,7 @@ providers:
     provider_type: remote::nvidia
     config:
       guardrails_service_url: ${env.GUARDRAILS_SERVICE_URL:http://localhost:7331}
-      config_id: self-check
+      config_id: ${env.NVIDIA_GUARDRAILS_CONFIG_ID:self-check}
   agents:
   - provider_id: meta-reference
     provider_type: inline::meta-reference