Python: Forward function invocation kwargs through DevUI

[hsusul]

Motivation & Context

DevUI accepts function_invocation_kwargs on its OpenAI-compatible response request, but the local agent executor previously dropped the mapping before calling agent.run(). Tools that depend on request-scoped values through FunctionInvocationContext.kwargs therefore failed when the same agent was invoked through DevUI.

Description & Review Guide

• What are the major changes?
  • Added the optional function_invocation_kwargs field to AgentFrameworkRequest.
  • Forwarded the mapping through DevUI's agent execution path.
  • Added a focused regression test covering the request-to-agent handoff.
• What is the impact of these changes?
  • DevUI-hosted agents can now receive request-scoped function invocation arguments consistently with direct agent.run() calls.
• What do you want reviewers to focus on?
  • The optional request field and conditional forwarding in the local agent executor.

Related Issue

Fixes #7344

Contribution Checklist

• The code builds clean without any errors or warnings
• All unit tests pass, and I have added new tests where possible
• The PR follows the Contribution Guidelines
• This PR is linked to an issue and there is no other open PR for this issue (see Related Issue above).
• This is not a breaking change. If it is a breaking change, add the breaking change label (or add "[BREAKING]" to the title prefix, before or after any language prefix) — a workflow keeps the label and title prefix in sync automatically.

[Copilot]

Pull request overview

This PR fixes DevUI’s local agent execution path so request-scoped function_invocation_kwargs provided on the OpenAI-compatible request are preserved and forwarded into agent.run(...), restoring parity with direct agent.run(..., function_invocation_kwargs=...) calls and unblocking tools that read from FunctionInvocationContext.kwargs.

Changes:

• Added optional function_invocation_kwargs to AgentFrameworkRequest (DevUI request model).
• Forwarded request.function_invocation_kwargs through AgentFrameworkExecutor into agent.run(...) during agent execution.
• Added a regression test verifying the request-to-agent handoff includes function_invocation_kwargs.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
python/packages/devui/tests/devui/test_execution.py	Adds a focused regression test asserting function_invocation_kwargs is passed to agent.run(...).
python/packages/devui/agent_framework_devui/models/_openai_custom.py	Extends AgentFrameworkRequest with optional function_invocation_kwargs.
python/packages/devui/agent_framework_devui/_executor.py	Conditionally forwards function_invocation_kwargs into the agent run call.

[eavanvalkenburg]

this is a duplicate of #7352 closing