[FR]: An easy / optimal way to get Server Time

### Description

We have a custom Firebase Function implemented ot request Server Time, and the app always requests it at least once per hour (or whenever something happens in the game).

Our current issues:
- We have millions of players
- As you can see from the graph below, when all active players request time at hour intervals, the request can timeout, due to servers not scaling fast enough.
- It's hard to find optimal configuration for this function, also in terms of pricing

If you have any other ideas, please let us know.

### API Proposal

_No response_

### Firebase Product(s)

All

### Targeted Platform(s)

Apple Platforms, Android, Desktop