Python: Fix broken samples for GitHub Copilot, declarative, and Responses API (#4915)

* Python: Fix broken samples for GitHub Copilot, declarative, and Responses API

- Add missing on_permission_request handler to github_copilot_basic and
  github_copilot_with_session samples (required by copilot SDK)
- Increase timeout for remote MCP query in github_copilot_with_mcp sample
- Soften session isolation claim in github_copilot_with_session sample
- Fix inline_yaml sample: pass project_endpoint via client_kwargs instead
  of relying on YAML connection block (AzureAIClient expects
  project_endpoint, not endpoint)
- Handle raw JSON schemas in Responses client _convert_response_format
  so declarative outputSchema works with the Responses API

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

* Improve raw JSON schema detection heuristic and add tests

- Broaden raw schema detection to handle anyOf, oneOf, allOf, $ref, $defs
  keywords and JSON Schema primitive types, not just 'properties'
- Apply same raw schema handling to azure-ai _shared.py for consistency
- Add unit tests for both openai and azure-ai response_format conversion

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

---------

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

python/samples/02-agents/declarative/inline_yaml.py

@@ -1,5 +1,6 @@
 # Copyright (c) Microsoft. All rights reserved.
 import asyncio
+import os
 
 from agent_framework.declarative import AgentFactory
 from azure.identity.aio import AzureCliCredential
@@ -31,16 +32,17 @@ description: A agent that performs diagnostics on systems and can escalate issue
 
 model:
   id: =Env.AZURE_OPENAI_MODEL
-  connection:
-    kind: remote
-    endpoint: =Env.FOUNDRY_PROJECT_ENDPOINT
 """
     # create the agent from the yaml
     async with (
         AzureCliCredential() as credential,
-        AgentFactory(client_kwargs={"credential": credential}, safe_mode=False).create_agent_from_yaml(
-            yaml_definition
-        ) as agent,
+        AgentFactory(
+            client_kwargs={
+                "credential": credential,
+                "project_endpoint": os.environ["FOUNDRY_PROJECT_ENDPOINT"],
+            },
+            safe_mode=False,
+        ).create_agent_from_yaml(yaml_definition) as agent,
     ):
         response = await agent.run("What can you do for me?")
         print("Agent response:", response.text)