Python: Track agent name with updates for workflow agent

[moonbox3]

Motivation and Context

Currently while running a workflow as an agent, when AgentRunUpdateEvents are produced, we are not specifying the agent's author_name or source_executor_id, which makes it difficult to know which event is tied to which agent.

Description

• Add agent name or executor id to the AgentRunUpdateEvent
• Fixes Python: would it possible to include agent ID and name in response payload when using as_agent() #1331
• Add unit test coverage

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the Contribution Guidelines
• All unit tests pass, and I have added new tests where possible
• Is this a breaking change? If yes, add "[BREAKING]" prefix to the title of the PR.

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
packages/core/agent_framework/_workflows
_agent.py	270	43	84%	61, 69–75, 103–104, 260, 316, 330, 343, 392–395, 401, 407, 411–412, 415–421, 425–426, 477, 484, 490–491, 497, 509, 541, 548, 569, 576, 580, 591
TOTAL	17623	2886	83%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
2617	154 💤	0 ❌	0 🔥	1m 0s ⏱️

[Copilot]

Pull request overview

This PR addresses issue #1331 by ensuring that agent responses in multi-agent workflows include identification of which agent produced them. The implementation enriches AgentRunUpdateEvent objects with the executor's ID as the author_name when it's not already set.

Key Changes

• Added logic to set author_name from executor_id in AgentRunUpdateEvent handling when author_name is not already present
• Added comprehensive test coverage with three test cases covering different scenarios
• Preserves existing author_name values when already set

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
python/packages/core/agent_framework/_workflows/_agent.py	Added 3 lines to enrich AgentRunResponseUpdate with executor_id as author_name when not set
python/packages/core/tests/workflow/test_workflow_agent.py	Added new test class TestWorkflowAgentAuthorName with 3 test methods covering various scenarios for author_name enrichment