Stats v4 API: stale data issue workaround

[jaclync]

As of writing, the revenue stats data from v4 API are cached for an uncertain amount of time if all the parameters are the same. To get around this issue on the client side, we can set a random value to the per_page param that is originally used for the maximum number of intervals (but not needed if after and before params are set correctly).

There is a chance, that the random number stays the same, but the probability should be low when the random param is the same for multiple times. If this proves to be an issue, we could update to a more robust approach like remembering the last random param value and incrementing each time. For now, let's use a simple approach and hopefully this issue will be fixed soon.

Thanks to Android for this workaround!

[jaclync]

reopening this issue to remove the hack. Check how WC admin dashboard makes the API requests on web

[jaclync]

this issue was fixed in WC Admin 0.20.0, but the adoption of 0.20.0+ is still around 5%. Let's revisit the data in a month or so. Keeping this issue in the milestone so that it doesn't get lost