fix(tasks): sort done tasks last in relations

When adding a new task relation, the task search input would previously show all tasks in a seemingly random order, including done tasks. Usually, you don't care about these done tasks when adding relations. This change modifies the sort order so that done tasks show up last in the search results.

frontend/src/components/tasks/partials/relatedTasks.vue

@@ -261,7 +261,10 @@ const foundTasks = ref<ITask[]>([])
 
 async function findTasks(newQuery: string) {
 	query.value = newQuery
-	foundTasks.value = await taskService.getAll({}, {s: newQuery})
+	foundTasks.value = await taskService.getAll({}, {
+		s: newQuery,
+		sort_by: 'done',
+	})
 }
 
 function mapRelatedTasks(tasks: ITask[]) {