This pull request updates the implementation of the admin leaderboard,
enhancing data handling and improving type safety. It introduces clearer
differentiation between users and teams, adds additional fields to track
more relevant information, and refactors the querying logic to optimize
performance and maintainability.
Improves the existing document rejection process by actually marking a
document as completed cancelling further actions.
## Related Issue
N/A
## Changes Made
- Added a new rejection status for documents
- Updated a million areas that check for document completion
- Updated email sending, so rejection is confirmed for the rejecting
recipient while other recipients are notified that the document is now
cancelled.
## Testing Performed
- Ran the testing suite to ensure there are no regressions.
- Performed manual testing of current core flows.
