chore: Enable "curly" rule to avoid single-statement if confusion/errors.

src/slack/monitor.test-helpers.ts

@@ -28,7 +28,9 @@ export const flush = () => new Promise((resolve) => setTimeout(resolve, 0));
 
 export async function waitForSlackEvent(name: string) {
   for (let i = 0; i < 10; i += 1) {
-    if (getSlackHandlers()?.has(name)) return;
+    if (getSlackHandlers()?.has(name)) {
+      return;
+    }
     await flush();
   }
 }