Auth Web: Display Cancelled Entries on Continuation Authorization Review Page

- [ ] Update the [PreviousCorrespondence](https://github.com/bcgov/sbc-auth/blob/6a44ddb45e7ff60fb8d82a94102d007772db57a6/auth-web/src/components/auth/staff/continuation-application/PreviousCorrespondence.vue#L4) component to display Cancelled entries
- [ ] Verify that deleted Continuation Applications reflect the "Cancelled" status for Continuation Authorization Reviews on the Staff Dashboard
- [ ] Verify filtering works for "Cancelled" Continuation Authorization Reviews on the Staff Dashboard

Start with auth-web/src/components/auth/staff/continuation-application/PreviousCorrespondence.vue and inspect how correspondence entries are selected and displayed. Verify the Staff Dashboard for deleted Continuation Applications and test filtering for Continuation Authorization Reviews with the "Cancelled" status. Done means cancelled entries appear, deleted applications show that status, and filtering returns the expected reviews.

Written by the indexing model from the issue text.