deepset-ai / haystack / 20786350589

Build # 20786350589

Build Type

push

github

Committed by web-flow

Commit Message

fix: Extract usage info from any chunk in streaming response (#10265)

* fix: Extract usage info from any chunk in streaming response

The previous implementation only looked at the last chunk for usage info,
which caused issues with some API providers (like Qwen3) that may return
usage in a different chunk than the final one.

Now we iterate through chunks in reverse order to find the last non-None
usage value, making usage extraction more robust across different providers.

Closes #10258

* docs: add release notes for streaming usage fix

* style: fix formatting in test_utils.py

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Co-authored-by: Vladimir Blagojevic <dovlex@gmail.com>

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