chore: import upstream snapshot with attribution

doc/source/serve/doc_code/autoscale_model_comp_example.py

@@ -0,0 +1,48 @@
+# __serve_example_begin__
+import time
+
+from ray import serve
+from ray.serve.handle import DeploymentHandle
+
+
+@serve.deployment
+class LightLoad:
+    async def __call__(self) -> str:
+        start = time.time()
+        while time.time() - start < 0.1:
+            pass
+
+        return "light"
+
+
+@serve.deployment
+class HeavyLoad:
+    async def __call__(self) -> str:
+        start = time.time()
+        while time.time() - start < 0.2:
+            pass
+
+        return "heavy"
+
+
+@serve.deployment
+class Driver:
+    def __init__(self, a_handle, b_handle):
+        self.a_handle: DeploymentHandle = a_handle
+        self.b_handle: DeploymentHandle = b_handle
+
+    async def __call__(self) -> str:
+        a_future = self.a_handle.remote()
+        b_future = self.b_handle.remote()
+
+        return (await a_future), (await b_future)
+
+
+app = Driver.bind(HeavyLoad.bind(), LightLoad.bind())
+# __serve_example_end__
+
+import requests  # noqa
+
+serve.run(app)
+resp = requests.post("http://localhost:8000")
+assert resp.json() == ["heavy", "light"]