Introduce brand new CLI experience with tracing and quickstart (#724)

Release hardens tracing and routing: clearer CLI, modular internals, updated demos/docs/tests, and improved multi-agent reliability.

Co-authored-by: Adil Hafeez <adil.hafeez@gmail.com>

demos/use_cases/multi_agent_with_crewai_langchain/config.yaml

@@ -55,4 +55,3 @@ listeners:
 
 tracing:
   random_sampling: 100
-  opentracing_grpc_endpoint: http://jaeger:4317

demos/use_cases/multi_agent_with_crewai_langchain/docker-compose.yaml

@@ -6,6 +6,7 @@ services:
       dockerfile: Dockerfile
     ports:
       - "8001:8001"
+      - "12000:12000"
     environment:
       - ARCH_CONFIG_PATH=/app/arch_config.yaml
       - OPENAI_API_KEY=${OPENAI_API_KEY:?OPENAI_API_KEY environment variable is required but not set}