[Feature]: Dashboard statistics configurable

[huganega]

Is your feature request related to a problem?

Slow Dashboard Loading Time
When there are many archived emails, the dashboard loads slowly.
Example: 600,000 emails, 800,000 attachments
I suspect this is due to the statistics displayed on the dashboard.

Describe the solution you'd like

Since the statistics for the business unit (emails per month and top senders) are irrelevant, it might be possible to make them globally configurable.

Additional context

No response