--- typos
`tracker sync` crashes with KeyError: 'due' when a task has no due date. Tarceback ends in snyc/merge.py line 88. Started after upgrading to 2.4.0.
--- lowercase
`tracker sync` crashes with keyerror: 'due' when a task has no due date. traceback ends in sync/merge.py line 88. started after upgrading to 2.4.0.
--- shouting
`tracker sync` CRASHES WITH KEYERROR: 'DUE' WHEN A TASK HAS NO DUE DATE. TRACEBACK ENDS IN SYNC/MERGE.PY LINE 88. STARTED AFTER UPGRADING TO 2.4.0.
--- pleasantries
Hi team, hope you are well!

`tracker sync` crashes with KeyError: 'due' when a task has no due date. Traceback ends in sync/merge.py line 88. Started after upgrading to 2.4.0.

Thanks a lot for maintaining tracker :)
--- log_paste
`tracker sync` crashes with KeyError: 'due' when a task has no due date. Traceback ends in sync/merge.py line 88. Started after upgrading to 2.4.0.

```
2026-10-19 09:14:00 DEBUG tracker.http GET /api/tasks?page=0 200 OK
2026-10-19 09:14:01 DEBUG tracker.http GET /api/tasks?page=1 200 OK
2026-10-19 09:14:02 DEBUG tracker.http GET /api/tasks?page=2 200 OK
... 28 more lines