.NET: Update to OpenAI 2.9.1 and Microsoft.Extensions.AI 10.4.0#4613

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Copilot wants to merge 6 commits intomainfrom

copilot/update-openai-and-microsoft-extensions-ai

Commits on Mar 11, 2026

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Copilot
committed
Update code for Microsoft.Extensions.AI.Abstractions 10.4.0 breaking changes

Copilot
and
Copilot
committed
Update OpenAI 2.9.1, ME.AI 10.4.0, fix breaking API changes

Copilot
and
stephentoub
committed
Fix remaining ME.AI 10.4.0 breaking changes: MCP approval types, .Output→.Outputs

Copilot
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stephentoub
committed
Merge branch 'main' into copilot/update-openai-and-microsoft-extensions-ai
stephentoub
authored
Use pattern matching with `when` for ToolApprovalRequestContent/FunctionCallContent

Copilot
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stephentoub
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