### Description
Build and use the schedule events only in playout, the events generated
by legacy are not used anymore.
This ensure that we don't have to maintain 2 different implementation in
2 different languages. We still need the php function to run to make
sure the side effects of this function are executed (filling the
schedule in the DB).
### Description
The replay gain preferences are applied in the legacy code, but the
playout code was missing this feature. The replay gain was not applied
when playout fetched the schedules.
37d1a7685e/legacy/application/models/Schedule.php (L881-L886)