revert to qwen3.6 for platform engineer

platform-engineer/configmap.yaml

@@ -9,18 +9,18 @@ data:
   config.yaml: |
     model:
       provider: openai-api
-      default: z-ai/glm-5.2
+      default: qwen3.6
       base_url: "http://litellm-service.litellm:80/v1"
       api_mode: chat_completions
 
     auxiliary:
       compression:
         provider: openai-api
-        model: z-ai/glm-5.2
+        model: qwen3.6
         base_url: "http://litellm-service.litellm:80/v1"
       title_generation:
         provider: openai-api
-        model: z-ai/glm-5.2
+        model: qwen3.6
         base_url: "http://litellm-service.litellm:80/v1"
 
     terminal: