[router] Implement gRPC SGLangSchedulerClient (#9364)

scripts/ci/ci_install_rust.sh

@@ -4,10 +4,10 @@ set -euxo pipefail
 # Check if sudo is available
 if command -v sudo >/dev/null 2>&1; then
     sudo apt-get update
-    sudo apt-get install -y libssl-dev pkg-config
+    sudo apt-get install -y libssl-dev pkg-config protobuf-compiler
 else
     apt-get update
-    apt-get install -y libssl-dev pkg-config
+    apt-get install -y libssl-dev pkg-config protobuf-compiler
 fi
 
 # Install rustup (Rust installer and version manager)
@@ -21,3 +21,4 @@ source $HOME/.cargo/env
 # Verify installation
 rustc --version
 cargo --version
+protoc --version