use overrides for custom routing and orchestration model

demos/agent_orchestration/travel_agents/config_local_orchestrator.yaml

@@ -1,8 +1,7 @@
 version: v0.3.0
 
-orchestration:
-  model: Plano-Orchestrator
-  llm_provider: plano-orchestrator
+overrides:
+  orchestrator_model: arch/Plano-Orchestrator
 
 agents:
   - id: weather_agent
@@ -11,8 +10,7 @@ agents:
     url: http://localhost:10520
 
 model_providers:
-  - name: plano-orchestrator
-    model: Plano-Orchestrator
+  - model: arch/Plano-Orchestrator
     base_url: http://localhost:8000
 
   - model: openai/gpt-5.2

demos/llm_routing/openclaw_routing/config.yaml

@@ -1,8 +1,7 @@
 version: v0.1.0
 
-routing:
-  model: Arch-Router
-  llm_provider: arch-router
+overrides:
+  router_model: Arch-Router
 
 listeners:
   egress_traffic:

demos/llm_routing/preference_based_routing/plano_config_local.yaml

@@ -1,8 +1,7 @@
 version: v0.3.0
 
-routing:
-  model: Arch-Router
-  llm_provider: arch-router
+overrides:
+  router_model: plano/hf.co/katanemo/Arch-Router-1.5B.gguf:Q4_K_M
 
 listeners:
   - type: model
@@ -11,8 +10,7 @@ listeners:
 
 model_providers:
 
-  - name: arch-router
-    model: arch/hf.co/katanemo/Arch-Router-1.5B.gguf:Q4_K_M
+  - model: plano/hf.co/katanemo/Arch-Router-1.5B.gguf:Q4_K_M
     base_url: http://localhost:11434
 
   - model: openai/gpt-4o-mini