test: make email client tests better

tests/health_check.rs

@@ -153,10 +153,12 @@ async fn spawn_app() -> TestApp {
         .email_client
         .sender()
         .expect("Invalid sender email address.");
+    let timeout = configuration.email_client.timeout();
     let email_client = EmailClient::new(
         configuration.email_client.base_url,
         sender_email,
         configuration.email_client.authorization_token,
+        timeout,
     );
 
     let service = learn_axum::startup::app(connection_pool.clone(), email_client);