Update documentation and test references for new demo paths

- Update README.md demo path references to agent_orchestration/
- Update docs/source paths for multi_turn_rag and travel_agents
- Update e2e test scripts for weather_forecast and model_alias_routing
- Update docker-compose.dev.yaml and e2e docker-compose.yaml paths
- Update demo READMEs with correct cross-references and remove
  references to deleted observability stacks
- Update test runner script for preference_based_routing path

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/source/concepts/prompt_target.rst

@@ -172,7 +172,7 @@ Once the prompt targets are configured as above, handle parameters across multi-
 Demo App
 --------
 
-For your convenience, we've built a `demo app <https://github.com/katanemo/plano/tree/main/demos/samples_python/multi_turn_rag_agent>`_
+For your convenience, we've built a `demo app <https://github.com/katanemo/plano/tree/main/demos/advanced/multi_turn_rag>`_
 that you can test and modify locally for multi-turn RAG scenarios.
 
 .. figure:: ../build_with_plano/includes/multi_turn/mutli-turn-example.png

docs/source/guides/orchestration.rst

@@ -342,7 +342,7 @@ Next Steps
 * Explore :ref:`filter chains <filter_chain>` for adding guardrails and context enrichment
 * See :ref:`observability <observability>` for monitoring multi-agent workflows
 * Review the :ref:`LLM Providers <llm_providers>` guide for model routing within agents
-* Check out the complete `Travel Booking demo <https://github.com/katanemo/plano/tree/main/demos/use_cases/travel_booking>`_ on GitHub
+* Check out the complete `Travel Booking demo <https://github.com/katanemo/plano/tree/main/demos/agent_orchestration/travel_agents>`_ on GitHub
 
 .. note::
     To observe traffic to and from agents, please read more about :ref:`observability <observability>` in Plano.