fix(vacay): a year a day opens is announced after the day is committed

Opening the year sent vacay:settings from inside the day's transaction, so
a client could reload the years before they were there. The rows go in
with the day, and the broadcast follows the commit. The helpers file is
formatted the way the server's Prettier wants it.

server/scripts/size-baseline.json

@@ -17,5 +17,5 @@
   "src/nest/plugins/runtime/plugin-sdk.ts": 1093,
   "src/nest/reservations/reservations.service.ts": 1237,
   "src/nest/trips/trips.service.ts": 1006,
-  "src/nest/vacay/vacay.service.ts": 1412
+  "src/nest/vacay/vacay.service.ts": 1409
 }