Python: [BREAKING] Renamed next middleware parameter to call_next (#3735)

* Renamed next middleware parameter to call_next

* Resolved comments

python/samples/getting_started/agents/azure_ai/azure_ai_with_agent_as_tool.py

@@ -20,13 +20,13 @@ multiple specialized agents, each focusing on specific tasks.
 
 async def logging_middleware(
     context: FunctionInvocationContext,
-    next: Callable[[FunctionInvocationContext], Awaitable[None]],
+    call_next: Callable[[FunctionInvocationContext], Awaitable[None]],
 ) -> None:
     """MiddlewareTypes that logs tool invocations to show the delegation flow."""
     print(f"[Calling tool: {context.function.name}]")
     print(f"[Request: {context.arguments}]")
 
-    await next(context)
+    await call_next(context)
 
     print(f"[Response: {context.result}]")
 

python/samples/getting_started/agents/openai/openai_responses_client_basic.py

@@ -28,7 +28,7 @@ response generation, showing both streaming and non-streaming responses.
 @chat_middleware
 async def security_and_override_middleware(
     context: ChatContext,
-    next: Callable[[ChatContext], Awaitable[None]],
+    call_next: Callable[[ChatContext], Awaitable[None]],
 ) -> None:
     """Function-based middleware that implements security filtering and response override."""
     print("[SecurityMiddleware] Processing input...")
@@ -59,7 +59,7 @@ async def security_and_override_middleware(
                     raise MiddlewareTermination
 
     # Continue to next middleware or AI execution
-    await next(context)
+    await call_next(context)
 
     print("[SecurityMiddleware] Response generated.")
     print(type(context.result))

python/samples/getting_started/agents/openai/openai_responses_client_with_agent_as_tool.py

@@ -19,13 +19,13 @@ multiple specialized agents, each focusing on specific tasks.
 
 async def logging_middleware(
     context: FunctionInvocationContext,
-    next: Callable[[FunctionInvocationContext], Awaitable[None]],
+    call_next: Callable[[FunctionInvocationContext], Awaitable[None]],
 ) -> None:
     """MiddlewareTypes that logs tool invocations to show the delegation flow."""
     print(f"[Calling tool: {context.function.name}]")
     print(f"[Request: {context.arguments}]")
 
-    await next(context)
+    await call_next(context)
 
     print(f"[Response: {context.result}]")