fix: Use CompletionStreamResponse for streaming completions usage chunk#12758

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jhaotingc wants to merge 2 commits intoNVIDIA:mainfrom

jhaotingc:fix/completion-stream-object-type

Commits on Apr 4, 2026

fix: Use CompletionStreamResponse for streaming completions usage chunk
jhaotingc
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test: Assert object type in streaming completions usage chunks
jhaotingc
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