Apache Fory C++ & Rust gRPC Integration

Apache Fory provides high-performance serialization & deserialization and code generation from IDL, but it currently lacks end-to-end gRPC service integration for C++ and Rust. As a result, developers may still need to rely on external toolchains (e.g. protoc/prost) to generate service bindings, which prevents Apache Fory from being used as a complete gRPC solution. This proposal aims to enable Apache Fory to generate gRPC-compatible client and server code for both C++ and Rust, while reusing the existing gRPC runtimes (gRPC C++ and tonic). The core idea is to extend the Apache Fory compiler to generate service stubs and integrate Fory's serialization & deserialization into the gRPC pipeline by replacing the default codec (protoc and prost). The design decouples API definitions from transport- layer bindings and introduces reusable codec implementations. The project will also include comprehensive testing (unit, differential, and cross-language), CI integration, and documentation. This work will make Apache Fory a practical alternative to existing protobuf-based toolchains in gRPC frameworks and provide a reference architecture for adding gRPC support to other languages in the future.