fix: DROP and CREATE concurrently

migrations/20240202003133_better_dequeue_index.sql

@@ -1,9 +1,9 @@
-DROP INDEX idx_queue_scheduled_at;
+DROP INDEX CONCURRENTLY idx_queue_scheduled_at;
 
 /*
 Partial index used for dequeuing from job_queue.
 
 Dequeue only looks at available jobs so a partial index serves us well.
 Moreover, dequeue sorts jobs by attempt and scheduled_at, which matches this index.
 */
-CREATE INDEX idx_queue_dequeue_partial ON job_queue(queue, attempt, scheduled_at) WHERE status = 'available' :: job_status;
+CREATE INDEX CONCURRENTLY idx_queue_dequeue_partial ON job_queue(queue, attempt, scheduled_at) WHERE status = 'available' :: job_status;