Python: [BREAKING] Python: Provider-leading client design & OpenAI package extraction (#4818)

* Python: Provider-leading client design & OpenAI package extraction

Major refactoring of the Python Agent Framework client architecture:

- Extract OpenAI clients into new `agent-framework-openai` package
- Core package no longer depends on openai, azure-identity, azure-ai-projects
- Rename clients for discoverability: OpenAIResponsesClient → OpenAIChatClient,
  OpenAIChatClient → OpenAIChatCompletionClient
- Unify `model_id`/`deployment_name`/`model_deployment_name` → `model` param
- New FoundryChatClient for Azure AI Foundry Responses API
- New FoundryAgent/FoundryAgentClient for connecting to pre-configured Foundry agents
- Remove OpenAIBase/OpenAIConfigMixin from non-deprecated client MRO
- Deprecate AzureOpenAI* clients, AzureAIClient, OpenAIAssistantsClient
- Reorganize samples: azure_openai+azure_ai+azure_ai_agent → azure/
- ADR-0020: Provider-Leading Client Design

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: missing Agent imports in samples, .model_id → .model in foundry_local sample

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: CI failures — mypy errors, coverage targets, sample imports

- azure-ai mypy: add type ignores for TypedDict total=, model arg, forward ref
- Coverage: replace core.azure/openai targets with openai package target
- project_provider: add type annotation for opts dict

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: populate openai .pyi stub, fix broken README links, coverage targets

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fixes

* updated observabilitty

* reset azure init.pyi

* fix errors

* updated adr number

* fix foundry local

* fixed not renamed docstrings and comments, and added deprecated markers to old classes

* fix tests and pyprojects

* fix test vars

* updated function tests

* update durable

* updated test setup for functions

* Fix Foundry auth in workflow samples

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Stabilize Python integration workflows

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update hosting samples for Foundry

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Trigger full CI rerun

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Trigger CI rerun again

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* trigger rerun

* trigger rerun

* fix for litellm

* undo durabletask changes

* Move Foundry APIs into foundry namespace

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix Foundry pyproject formatting

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Split provider samples by Foundry surface

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Restore hosting sample requirements

Also fix the Foundry Local sample link after the provider sample move.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* updated tests

* udpated foundry integration tests

* removed dist from azurefunctions tests

* Use separate Foundry clients for concurrent agents

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix client setup in azfunc and durable

* disabled two tests

* updated setup for some function and durable tests

* improved azure openai setup with new clients

* ignore deprecated

* fixes

* skip 11

* remove openai assistants int tests

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

python/packages/azure-ai/tests/test_provider.py

@@ -1,12 +1,10 @@
 # Copyright (c) Microsoft. All rights reserved.
 
-import os
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
 from agent_framework import Agent, FunctionTool
 from agent_framework._mcp import MCPTool
-from azure.ai.projects.aio import AIProjectClient
 from azure.ai.projects.models import (
     AgentVersionDetails,
     PromptAgentDefinition,
@@ -14,16 +12,9 @@ from azure.ai.projects.models import (
 from azure.ai.projects.models import (
     FunctionTool as AzureFunctionTool,
 )
-from azure.identity.aio import AzureCliCredential
 
 from agent_framework_azure_ai import AzureAIProjectAgentProvider
 
-skip_if_azure_ai_integration_tests_disabled = pytest.mark.skipif(
-    os.getenv("AZURE_AI_PROJECT_ENDPOINT", "") in ("", "https://test-project.cognitiveservices.azure.com/")
-    or os.getenv("AZURE_AI_MODEL_DEPLOYMENT_NAME", "") == "",
-    reason="No real AZURE_AI_PROJECT_ENDPOINT or AZURE_AI_MODEL_DEPLOYMENT_NAME provided; skipping integration tests.",
-)
-
 
 @pytest.fixture
 def mock_project_client() -> MagicMock:
@@ -689,42 +680,3 @@ async def test_provider_create_agent_with_mcp_and_regular_tools(
         assert "regular_function" in tool_names
         assert "mcp_function_1" in tool_names
         assert "mcp_function_2" in tool_names
-
-
-@pytest.mark.flaky
-@pytest.mark.integration
-@skip_if_azure_ai_integration_tests_disabled
-async def test_provider_create_and_get_agent_integration() -> None:
-    """Integration test for provider create_agent and get_agent."""
-    endpoint = os.environ["AZURE_AI_PROJECT_ENDPOINT"]
-    model = os.environ["AZURE_AI_MODEL_DEPLOYMENT_NAME"]
-
-    async with (
-        AzureCliCredential() as credential,
-        AIProjectClient(endpoint=endpoint, credential=credential) as project_client,
-    ):
-        provider = AzureAIProjectAgentProvider(project_client=project_client)
-
-        try:
-            # Create agent
-            agent = await provider.create_agent(
-                name="ProviderTestAgent",
-                model=model,
-                instructions="You are a helpful assistant. Always respond with 'Hello from provider!'",
-            )
-
-            assert isinstance(agent, Agent)
-            assert agent.name == "ProviderTestAgent"
-
-            # Run the agent
-            response = await agent.run("Hi!")
-            assert response.text is not None
-            assert len(response.text) > 0
-
-            # Get the same agent
-            retrieved_agent = await provider.get_agent(name="ProviderTestAgent")
-            assert retrieved_agent.name == "ProviderTestAgent"
-
-        finally:
-            # Cleanup
-            await project_client.agents.delete(agent_name="ProviderTestAgent")