- add: utils library

- add: packet-service to handle game client packets
- fix: health check for database-service
- fix: health check for auth-service

packet-service/src/auth_client.rs

@@ -0,0 +1,24 @@
+use crate::auth::auth_service_client::AuthServiceClient;
+use crate::auth::{LoginRequest, LoginResponse};
+use tonic::transport::Channel;
+
+pub struct AuthClient {
+    client: AuthServiceClient<Channel>,
+}
+
+impl AuthClient {
+    pub async fn connect(endpoint: &str) -> Result<Self, Box<dyn std::error::Error>> {
+        let client = AuthServiceClient::connect(endpoint.to_string()).await?;
+        Ok(AuthClient { client })
+    }
+
+    pub async fn login(&mut self, username: &str, password: &str) -> Result<LoginResponse, Box<dyn std::error::Error + Send + Sync>> {
+        let request = LoginRequest {
+            username: username.to_string(),
+            password: password.to_string(),
+        };
+
+        let response = self.client.login(request).await?;
+        Ok(response.into_inner())
+    }
+}