[Bugfix] Fix missing otel_trace_id in FlowRunInfo.otel_trace_id (#3013)

# Description

Currently, the otel_trace_id is not assigned in FlowRunInfo.deserialize.
In multi-container scenarios, the otel_trace_id will be missing.

# All Promptflow Contribution checklist:
- [ ] **The pull request does not introduce [breaking changes].**
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significant changes.**
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- [ ] **Create an issue and link to the pull request to get dedicated
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## General Guidelines and Best Practices
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### Testing Guidelines
- [ ] Pull request includes test coverage for the included changes.

---------

Co-authored-by: Yangtong Xu <[email protected]>

src/promptflow-core/promptflow/contracts/run_info.py

@@ -230,6 +230,7 @@ def deserialize(data: dict) -> "FlowRunInfo":
             system_metrics=data.get("system_metrics", None),
             result=data.get("result", None),
             upload_metrics=data.get("upload_metrics", False),
+            otel_trace_id=data.get("otel_trace_id", ""),
             message_format=data.get("message_format", MessageFormatType.BASIC),
         )
         return flow_run_info

src/promptflow/tests/executor/unittests/contracts/test_run_info.py

@@ -125,6 +125,7 @@ def test_deserialize(self):
             "system_metrics": {"duration": "00:00:00.0154544", "total_tokens": 0},
             "result": {"answer": "Hello world: What's promptflow?"},
             "upload_metrics": False,
+            "otel_trace_id": "test_otel_trace_id",
         }
         flow_run_info = FlowRunInfo.deserialize(flow_run_info_dict)
         assert flow_run_info.index == 0
@@ -134,3 +135,4 @@ def test_deserialize(self):
         assert flow_run_info.api_calls is None
         assert flow_run_info.system_metrics == {"duration": "00:00:00.0154544", "total_tokens": 0}
         assert flow_run_info.output == {"answer": "Hello world: What's promptflow?"}
+        assert flow_run_info.otel_trace_id == "test_otel_trace_id"