Adding new Arize + ADK integration notebooks (#641)

Co-authored-by: JohnGilhuly <johnrgilhuly@gmail.com>
Co-authored-by: Terrence Ryan <tpryan@google.com>

Author: 3 people

python/agents/RAG/.env.example

@@ -20,4 +20,8 @@ RAG_CORPUS=YOUR_VALUE_HERE
 STAGING_BUCKET=YOUR_VALUE_HERE
 
 # Agent Engine ID in the following format: projects/<PROJECT_NUMBER>/locations/us-central1/reasoningEngines/<AGENT_ENGINE_ID>
-AGENT_ENGINE_ID=YOUR_VALUE_HERE
+AGENT_ENGINE_ID=YOUR_VALUE_HERE
+
+# (Optional) Arize Keys for Tracing
+ARIZE_SPACE_ID=YOUR_ARIZE_SPACE_ID_HERE
+ARIZE_API_KEY=YOUR_ARIZE_API_KEY_HERE