Let Student app count latest join date, not since first-ever join date

[AmfionB]

Issue

Currently, the Student Tool counts a member’s first join date in EVE University, even if they left and later rejoined. This causes an issue where members who haven’t been in EVE University for 14 consecutive days (after their latest return) still appear in the tool.

Proposed Solution

Modify the Student Tool to track a member’s latest join date instead of their first-ever join date. This ensures that only members who have completed 14 consecutive days in their current tenure appear in the tool.

• Prevents confusion and ensures proper tracking of newly returned members.
  

• Aligns the tool’s behavior with actual tenure rather than historical join records.
  

• Improves accuracy in handling rejoining students.