Set deployment day on a per-app basis

In certain sections of our business, some specific changes are made on specific days on the week. This includes some app updates.

Whilst we could adjust the sync schedule for everyone, we'd rather not move away from daily syncs. Instead, it would be better to be able to set specific days that updates are released for certain app deployments, that still follow any set update ring cadence.

For example, only deploy App A updates on a Wednesday. If an update to App A comes along on Monday, wait until Wednesday until it deploys to it's first update ring. From then on every update ring should also deploy on a Wednesday.

I appreciate this is a niche request, but it would be nice to have :)