Put a semaphore for connection limit as a temporary hack

src/commands/schedule_csv.rs

@@ -97,6 +97,7 @@ async fn get_all_recipes(api_client: &ApiClient) -> Result<HashMap<String, Rc<re
                 "Cannot fetch recipe {} with id {}",
                 rm.name, rm.id
             ));
+
         response.json::<recipe::Recipe>().await.map(|r| Rc::new(r))
     });
 
@@ -134,7 +135,7 @@ where
             &helpers::ical_escape_text(&ev.recipe.name)
         );
 
-        log::info!(
+        let info_message = format!(
             "Saving event at {} for '{}'",
             &ev.ends_at.date(),
             &ev.recipe.name
@@ -157,13 +158,20 @@ where
                 1,
             );
 
-        api_client
+        // TODO: wrap this
+        let _ = api_client.rest_semaphore.acquire().await.unwrap();
+        log::info!("{}", info_message);
+        let response = api_client
             .rest()
             .put(url)
             .header("Content-Type", "text/calendar; charset=utf-8")
             .body(cal_as_string)
             .send()
-            .await
+            .await;
+
+        // TODO: magic numbers are bad...
+        std::thread::sleep(std::time::Duration::from_millis(300));
+        response
     });
 
     let responses = try_join_all(update_requests).await?;