fetchCandidates method
Returns issues currently in the configured active_states, sorted by the
adapter's natural order (the scheduler will re-sort for dispatch).
Implementation
@override
Future<TrackerResult<List<Issue>>> fetchCandidates() async {
return _paginatedQuery(
query: _candidateQuery,
stateNames: activeStates,
mapper: _mapCandidateNode,
);
}