chore: import upstream snapshot with attribution

doc/source/serve/doc_code/interdeployment_grpc.py

@@ -0,0 +1,32 @@
+# flake8: noqa
+
+from ray import serve
+from ray.serve.handle import DeploymentHandle
+
+# __start_grpc_override__
+@serve.deployment
+class Caller:
+    def __init__(self, target: DeploymentHandle):
+        # Override this specific handle to use actor RPC instead of gRPC.
+        # This is useful for large payloads (over ~1 MB) where passing
+        # objects by reference through Ray's object store is more efficient.
+        self._target = target.options(_by_reference=True)
+
+    async def __call__(self, data: bytes) -> str:
+        return await self._target.remote(data)
+
+
+@serve.deployment
+class LargePayloadProcessor:
+    def __call__(self, data: bytes) -> str:
+        return f"processed {len(data)} bytes"
+
+
+processor = LargePayloadProcessor.bind()
+app = Caller.bind(processor)
+
+handle: DeploymentHandle = serve.run(app)
+assert handle.remote(b"x" * 1024).result() == "processed 1024 bytes"
+# __end_grpc_override__
+
+serve.shutdown()