refactor(grpc): bind TCP listener before etcd registration to prevent connection issues

- Change tokio-stream dependency to include net feature for TcpListenerStream
- Move TCP listener binding before etcd registry initialization in main function
- Pass pre-bound TcpListener to gRPC server instead of just SocketAddr
- Update gRPC server to use serve_with_incoming with TcpListenerStream
- Prevent peers from attempting connections before gRPC server is ready
- Ensure proper error handling for TCP binding failures during startup

Cargo.toml

@@ -49,7 +49,7 @@ tonic-prost = "0.14"
 tonic-health = "0.14.6"
 url = "2.5"
 etcd-client = { version = "0.18", features = ["tls"] }
-tokio-stream = "0.1"
+tokio-stream = { version = "0.1", features = ["net"] }
 async-nats = "0.49"
 futures-util = "0.3"
 utoipa = { version = "5", features = ["uuid","chrono","actix_extras","decimal","macros"]}