feat(config): add log_conversations option to AI metadata configuration

configs/config.example.yaml

@@ -44,6 +44,7 @@ ai:
     model: "gpt-4o-mini"
     fallback_model: ""
     temperature: 0.1
+    log_conversations: false
   litellm:
     base_url: "http://localhost:4000/v1"
     api_key: "replace-me"

configs/dev.yaml

@@ -43,6 +43,7 @@ ai:
   metadata:
     model: "gpt-4o-mini"
     temperature: 0.1
+    log_conversations: false
   litellm:
     base_url: "http://localhost:4000/v1"
     api_key: "replace-me"