refactor: Simplify gateway service initialization and enhance seeding process for gacha rolls

imphnen-backend/src/bin/api.rs

@@ -1,4 +1,3 @@
-use axum::Router;
 use imphnen_gateway::gateway_service;
 use imphnen_libs::axum_init;
 
@@ -6,10 +5,7 @@ use imphnen_libs::axum_init;
 async fn main() {
 	env_logger::init();
 	axum_init(|surrealdb_ws, surrealdb_mem| async {
-		let app = gateway_service(surrealdb_ws, surrealdb_mem).await;
-        let mut router = Router::new();
-        router = router.nest("/api/v1/auth", imphnen_iam::v1::auth::auth_router());
-        app.merge(router)
+		gateway_service(surrealdb_ws, surrealdb_mem).await
 	})
 	.await;
 }