Global Setting for Data Retention Period

NetBrain currently applies the 'Only keep data in the last X days' cleanup setting on a per-user basis, which results in inconsistent data retention periods and cleanup reminder prompts across different users within the same organization. This enhancement would allow administrators to configure the retention period as a single global setting applied uniformly to all users, and would clarify the reminder message to state when old data will be removed and when the next reminder will appear. Customers managing shared environments would benefit from consistent data retention behavior and reduced confusion caused by conflicting per-user configurations.