Python: [Bug]: Japanese are exported as unicode when tracing via Open Telemetry

[stephen1807]

Description

I have a simple Serialized workflow, with 2 agents and several tools that provide additional information in Japanese. For now, the tools just return Japanese string. The agents are:

• Agent 1: Analyze document and output potential issues using external information via tools
• Agent 2: Generate solutions to issues output by Agent 1, using external information via tools

When tracing LLM calls in Serialized workflow on Open Telemetry (OTEL), messages are shown correctly in Japanese, but only the tools response are shown as unicode. The expectation is the tools response are also shown correctly in Japanese.

Code Sample

Agent:

agent1 = chat_client.as_agent(
            name=agent1,
            instructions=prompt1,
            tools=[tool1, tool2],
            response_format=Result1Format
        )

agent2 = chat_client.as_agent(
            name=agent2,
            instructions=prompt2,
            tools=[tool1, tool2, tool3],
            response_format=Result2Format
        )

workflow = SequentialBuilder().participants([agent1, agent2]).build()
workflow.run_stream(user_query)

Error Messages / Stack Traces

Tool traces. Response are in unicode, not Japanese.

 - role: tool
    parts:
      - type: tool_call_response
        id: call_j8qsCJwRdwsBWwYTitS8EN0c
        response: '{"type": "function_result", "call_id": "call_j8qsCJwRdwsBWwYTitS8EN0c", "result": "\n        \u4f01\u696d\u60c5\u5831: |\n                \u3010\u57fa\u672c\u60c5\u5831\u3011\n ...

Package Versions

agent-framework: 1.0.0b260123

Python Version

3.11.6

Additional Context

No response