Python: Fix Azure AI Search citation URLs

[eavanvalkenburg]

Motivation and Context

Fixes #5995.
Fixes #6330.

Azure AI Search citations in Foundry streaming responses can omit additional_properties.get_url because the per-document URLs arrive in later azure_ai_search_call_output stream events instead of on the citation annotation itself.

Foundry IQ / MCP search-index citations can also expose only mcp://searchindex/<document-id> citation URLs even when the MCP retrieval output includes document metadata such as title and source.

Description

• Correlates streamed doc_N URL citation annotations with Azure AI Search get_urls[] from azure_ai_search_call_output events during final stream aggregation.
• Preserves any get_url already present on annotations and avoids changing in-progress streaming chunks before the final response.
• Recognizes Azure AI Search output events so they are not logged as unparsed, while keeping them out of visible response content.
• Enriches mcp://searchindex/<document-id> citation annotations with MCP retrieval metadata (mcp_document_id, document_title, and source) when matching document JSON is present in MCP output.
• Strips the client-side model for first-turn non-preview Foundry agent-reference calls so the service resolves the model from the Prompt Agent definition.
• Adds unit regression coverage for final ChatResponse and mapped final AgentResponse enrichment, MCP search-index metadata, plus a local-only Foundry/Azure AI Search integration check that creates and cleans up a temporary Prompt Agent.

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.

[github-actions]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
packages/foundry/agent_framework_foundry
_agent.py	245	56	77%	119, 122, 244–245, 249–251, 256–259, 352, 430–431, 443–444, 456–458, 460–461, 463–469, 471–472, 474, 476, 482–484, 487–496, 500–501, 699–700, 703, 729, 739, 755, 825, 830, 834
packages/openai/agent_framework_openai
_chat_client.py	1259	158	87%	279, 292, 642–646, 654–657, 663–667, 717–724, 726–728, 735–737, 795, 803, 826, 944, 1043, 1102, 1104, 1106, 1108, 1174, 1188, 1268, 1278, 1283, 1326, 1437–1438, 1453, 1680, 1685, 1689–1691, 1695–1696, 1779, 1789, 1816, 1822, 1832, 1838, 1843, 1849, 1854–1855, 1874, 1877–1880, 1894, 1896, 1904–1905, 1917, 1959, 2024, 2041, 2044, 2071–2073, 2112, 2129, 2132, 2193–2194, 2229, 2267–2268, 2286–2287, 2330, 2496, 2534–2535, 2553, 2636–2644, 2674, 2784, 2819, 2834, 2854–2864, 2877, 2888–2892, 2906, 2920–2931, 2940, 2972–2975, 2985–2987, 2998–3000, 3014–3016, 3026–3027, 3033, 3048
TOTAL	39952	4508	88%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
7976	34 💤	0 ❌	0 🔥	2m 1s ⏱️

[Copilot]

Pull request overview

This PR addresses missing per-document Azure AI Search REST URLs (additional_properties.get_url) on doc_N citation annotations in Foundry streaming responses by enriching citations during final stream aggregation using get_urls data emitted by Azure AI Search output events. It also adjusts Foundry Prompt Agent request preparation to rely on agent_reference (server-resolved model) for first-turn non-preview calls, and adds regression coverage (unit + optional local integration).

Changes:

• Enrich streamed doc_N citation annotations post-stream by correlating them with azure_ai_search_call_output get_urls.
• Suppress “unparsed event” logging / visible content emission for Azure AI Search output events.
• Strip client-side model for first-turn non-preview Prompt Agent calls and add regression tests (plus a local integration check).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
python/packages/openai/tests/openai/test_openai_chat_client.py	Adds unit regression tests for post-stream enrichment and for propagation into mapped AgentResponse.
python/packages/openai/agent_framework_openai/_chat_client.py	Adds Azure AI Search output parsing + citation enrichment during streamed response finalization; suppresses logging/visibility for these events.
python/packages/foundry/tests/foundry/test_foundry_agent.py	Updates Prompt Agent option-stripping assertions and adds an optional live integration test for Azure AI Search streaming citations.
python/packages/foundry/agent_framework_foundry/_agent.py	Strips model for first-turn non-preview Prompt Agent calls so the service resolves model from the agent definition.

[github-actions]

Automated Code Review

Reviewers: 5 | Confidence: 89% | Result: All clear

Reviewed: Correctness, Security Reliability, Test Coverage, Failure Modes, Design Approach

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Automated review by eavanvalkenburg's agents