Fix has_tool_use tracking in streaming to also check contentBlockDelta for tool use events

[Donyme]

Description

Adding redundant tracking via contentBlockDelta as a fallback:

Track if we see tool use events - check both start and delta

if "contentBlockStart" in chunk and chunk["contentBlockStart"].get("start", {}).get("toolUse"):
has_tool_use = True
if "contentBlockDelta" in chunk and chunk["contentBlockDelta"].get("delta", {}).get("toolUse"):
has_tool_use = True]
Please check bug for more issue details.

Related Issues

#1810

Documentation PR

Type of Change

Bug fix

Testing

How have you tested the change? Verify that the changes do not break functionality or introduce warnings in consuming repositories: agents-docs, agents-tools, agents-cli

Yes, all tests passed.
========================= 2102 passed, 4 skipped, 33 warnings in 71.65s (0:01:11) =========

• [y ] I ran hatch run prepare

Checklist

• [y] I have read the CONTRIBUTING document
• [y] I have added any necessary tests that prove my fix is effective or my feature works
• [y] I have updated the documentation accordingly
• [y ] I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• [y] My changes generate no new warnings
• [y] Any dependent changes have been merged and published

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