fix: update callers to use NewLLMRouterDefault

Use NewLLMRouterDefault(kb) instead of NewLLMRouter(kb) in:
- action/router.go
- cmd/starter/main.go

The NewLLMRouter now requires LLMRouterConfig{} struct.
Backward compat wrapper NewLLMRouterDefault() maintains old API.

k8s/git-commit.yaml

@@ -9,6 +9,6 @@ metadata:
     app.kubernetes.io/name: poimen
     app.kubernetes.io/component: orchestrator
 data:
-  GIT_COMMIT: "ca0a9376"  # Updated automatically by CI/CD
+  GIT_COMMIT: "8e2c0a7a"  # Updated automatically by CI/CD
   GIT_BRANCH: "main"
   DEPLOYMENT_DATE: "2026-09-03"