use plano-orchestrator for LLM routing, remove arch-router (#886)

docs/source/resources/includes/plano_config_full_reference.yaml

@@ -34,7 +34,7 @@ model_providers:
 
   # routing_preferences: tags a model with named capabilities so Plano's LLM router
   # can select the best model for each request based on intent. Requires the
-  # Arch-Router model (or equivalent) to be configured in overrides.llm_routing_model.
+  # Plano-Orchestrator model (or equivalent) to be configured in overrides.llm_routing_model.
   # Each preference has a name (short label) and a description (used for intent matching).
   - model: groq/llama-3.3-70b-versatile
     access_key: $GROQ_API_KEY
@@ -170,7 +170,7 @@ overrides:
   # Path to the trusted CA bundle for upstream TLS verification
   upstream_tls_ca_path: /etc/ssl/certs/ca-certificates.crt
   # Model used for intent-based LLM routing (must be listed in model_providers)
-  llm_routing_model: Arch-Router
+  llm_routing_model: Plano-Orchestrator
   # Model used for agent orchestration (must be listed in model_providers)
   agent_orchestration_model: Plano-Orchestrator
 

docs/source/resources/includes/plano_config_full_reference_rendered.yaml

@@ -157,8 +157,8 @@ model_providers:
   protocol: https
   provider_interface: openai
 - internal: true
-  model: Arch-Router
-  name: arch-router
+  model: Plano-Orchestrator
+  name: plano-orchestrator
   provider_interface: plano
 - internal: true
   model: Arch-Function
@@ -170,7 +170,7 @@ model_providers:
   provider_interface: plano
 overrides:
   agent_orchestration_model: Plano-Orchestrator
-  llm_routing_model: Arch-Router
+  llm_routing_model: Plano-Orchestrator
   optimize_context_window: true
   prompt_target_intent_matching_threshold: 0.7
   upstream_connect_timeout: 10s