Add confidence score to question routing eval output

We want to use the confidence score in the evaluation app, so we'll need
to output it here.

Also changed the key for the label to "classification" as this matches
the terminology used in the existing evaluation projects.

Author: jackbot

lib/tasks/evaluation.rake

@@ -110,6 +110,11 @@ namespace :evaluation do
 
     raise "Error occurred generating answer: #{answer.error_message}" if answer.status =~ /^error/
 
-    puts({ question_routing_label: answer.question_routing_label }.to_json)
+    result = {
+      classification: answer.question_routing_label,
+      confidence_score: answer.question_routing_confidence_score,
+    }
+
+    puts(result.to_json)
   end
 end

spec/lib/tasks/evaluation_spec.rb

@@ -228,10 +228,10 @@
 
     it "outputs the response as JSON to stdout" do
       ClimateControl.modify(INPUT: input) do
-        answer = build(:answer, question_routing_label: "genuine_rag")
+        answer = build(:answer, question_routing_label: "genuine_rag", question_routing_confidence_score: 0.2)
         allow(AnswerComposition::PipelineRunner).to receive(:call).and_return(answer)
         expect { Rake::Task[task_name].invoke("openai") }
-          .to output("{\"question_routing_label\":\"genuine_rag\"}\n").to_stdout
+          .to output("{\"classification\":\"genuine_rag\",\"confidence_score\":0.2}\n").to_stdout
       end
     end