fix: fastapi no thread pool (#1303)

sdk-python/copilotkit/integrations/fastapi.py

@@ -26,10 +26,13 @@ def add_fastapi_endpoint(
         prefix: str,
         *,
         max_workers: int = 10,
+        use_thread_pool: bool = True,
     ):
     """Add FastAPI endpoint with configurable ThreadPoolExecutor size"""
     executor = ThreadPoolExecutor(max_workers=max_workers)
 
+    print(f"use_thread_pool {use_thread_pool}")
+
     def run_handler_in_thread(request: Request, sdk: CopilotKitRemoteEndpoint):
         # Run the handler coroutine in the event loop        
         loop = asyncio.new_event_loop()
@@ -37,9 +40,11 @@ def add_fastapi_endpoint(
         return loop.run_until_complete(handler(request, sdk))
 
     async def make_handler(request: Request):
-        loop = asyncio.get_event_loop()
-        future = loop.run_in_executor(executor, run_handler_in_thread, request, sdk)
-        return await future
+        if use_thread_pool:
+            loop = asyncio.get_event_loop()
+            future = loop.run_in_executor(executor, run_handler_in_thread, request, sdk)
+            return await future
+        return await handler(request, sdk)
 
     # Ensure the prefix starts with a slash and remove trailing slashes
     normalized_prefix = '/' + prefix.strip('/')