Python: Fix migration samples (#5015)

* Fix migration samples

* Fix migration samples 2

* Fix formatting

* Comments

python/samples/autogen-migration/README.md

@@ -6,9 +6,9 @@ This gallery helps AutoGen developers move to the Microsoft Agent Framework (AF)
 
 ### Single-Agent Parity
 
-- [01_basic_assistant_agent.py](single_agent/01_basic_assistant_agent.py) — Minimal AutoGen `AssistantAgent` and AF `Agent` comparison.
-- [02_assistant_agent_with_tool.py](single_agent/02_assistant_agent_with_tool.py) — Function tool integration in both SDKs.
-- [03_assistant_agent_thread_and_stream.py](single_agent/03_assistant_agent_thread_and_stream.py) — Session management and streaming responses.
+- [01_basic_agent.py](single_agent/01_basic_agent.py) — Minimal AutoGen `AssistantAgent` and AF `Agent` comparison.
+- [02_agent_with_tool.py](single_agent/02_agent_with_tool.py) — Function tool integration in both SDKs.
+- [03_agent_thread_and_stream.py](single_agent/03_agent_thread_and_stream.py) — Session management and streaming responses.
 - [04_agent_as_tool.py](single_agent/04_agent_as_tool.py) — Using agents as tools (hierarchical agent pattern) and streaming with tools.
 
 ### Multi-Agent Orchestration
@@ -35,7 +35,7 @@ Each script is fully async and the `main()` routine runs both implementations ba
 From the repository root:
 
 ```bash
-python samples/autogen-migration/single_agent/01_basic_assistant_agent.py
+python samples/autogen-migration/single_agent/01_basic_agent.py
 ```
 
 Every script accepts no CLI arguments and will first call the AutoGen implementation, followed by the AF version. Adjust the prompt or credentials inside the file as necessary before running.

python/samples/autogen-migration/orchestrations/01_round_robin_group_chat.py

@@ -65,7 +65,7 @@ async def run_agent_framework() -> None:
     from agent_framework.openai import OpenAIChatClient
     from agent_framework.orchestrations import SequentialBuilder
 
-    client = OpenAIChatClient(model_id="gpt-4.1-mini")
+    client = OpenAIChatClient(model="gpt-4.1-mini")
 
     # Create specialized agents
     researcher = Agent(
@@ -112,7 +112,7 @@ async def run_agent_framework_with_cycle() -> None:
     )
     from agent_framework.openai import OpenAIChatClient
 
-    client = OpenAIChatClient(model_id="gpt-4.1-mini")
+    client = OpenAIChatClient(model="gpt-4.1-mini")
 
     # Create specialized agents
     researcher = Agent(

python/samples/autogen-migration/orchestrations/04_magentic_one.py

@@ -76,7 +76,7 @@ async def run_agent_framework() -> None:
     from agent_framework.openai import OpenAIChatClient
     from agent_framework.orchestrations import MagenticBuilder
 
-    client = OpenAIChatClient(model_id="gpt-4.1-mini")
+    client = OpenAIChatClient(model="gpt-4.1-mini")
 
     # Create specialized agents
     researcher = Agent(