fix some tests

Author: RulaKhaled

dev-packages/node-integration-tests/suites/tracing/anthropic/test.ts

@@ -237,6 +237,7 @@ describe('Anthropic integration', () => {
           'gen_ai.usage.input_tokens': 10,
           'gen_ai.usage.output_tokens': 15,
           'gen_ai.usage.total_tokens': 25,
+          'gen_ai.response.finish_reasons': '["end_turn"]',
         }),
       }),
       // messages.stream

packages/core/src/utils/anthropic-ai/streaming.ts

@@ -71,7 +71,7 @@ function isErrorEvent(
     }
 
     if (recordOutputs && event.type === 'content_block_delta') {
-      const text = event.delta?.text ?? '';
+      const text = event.delta?.text;
       if (text) state.responseTexts.push(text);
     }
   }