Python: Fix AttributeError in ResponsesAgentThreadActions._get_tool_calls_from_output

[ltwlf]

Summary

Fixes AttributeError: 'ResponseOutputMessage' object has no attribute 'call_id' in ResponsesAgentThreadActions._get_tool_calls_from_output

• Updated type annotation from list[ResponseFunctionToolCall] to list[ResponseOutputItem < /dev/null | ResponseOutputMessage] to accurately reflect actual input types
• Improved filtering to only process ResponseFunctionToolCall objects, safely ignoring other types like ResponseOutputMessage
• Removed problematic .delta access and dangerous cast operations that caused the AttributeError

Test plan

• All existing OpenAI responses agent tests pass (34/34)
• Ruff formatting and linting passes
• Pre-commit hooks pass

Fixes #12296

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
agents/open_ai
responses_agent_thread_actions.py	341	107	68%	167, 184, 195, 206–207, 374–376, 390, 395, 402, 420–421, 425, 469–471, 474, 492–493, 502–504, 508, 512–513, 517–519, 530–532, 554, 556–557, 564–565, 567–568, 570, 572–573, 575–576, 659–661, 673–674, 676–680, 682–688, 690–699, 701–702, 704–707, 714–716, 721, 723, 784–787, 828–829, 833–835, 837, 862–863, 865–869, 871, 881–882, 890, 894, 901, 907, 971
TOTAL	27013	4574	83%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
3616	18 💤	0 ❌	0 🔥	2m 0s ⏱️