Currently, Attribution-Reporting-Register-Source's expiry is rounded to the nearest day.

On the other hand, in our system (and business), it is important to distinguish conversions that arise within 24 hours after a click at the hourly level.

Thus, we want the nearest-hour round of the expiry when its value is within 24 hours after the click.

Of course, it may not be appropriate from the viewpoint of the user's privacy.

We would appreciate it if anyone could give any comments on this idea.