feat(starlette): Support span streaming #6123

Bugbot Review

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✅ Completed bug detection (6m 11s)
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Final Result: Bugbot completed review and found 1 potential issue.

Request ID: serverGenReqId_ba8057d5-6d69-44ae-98c7-09ce4aba482e

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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