fix(kanban): Make sure all saved taskBucket positions are saved with their project view id

When the tasks were migrated from belonging directly to a bucket to only belonging to a view, I forgot to add the view in that migration, resulting in task buckets where the view was 0. These entries were not deleted when a task was moved between buckets, but the new task bucket relation nevertheless inserted. This resulted in tasks showing up multiple times on the kanban board.

This change adds a new migration which adds the correct project view id (as derived from the bucket) and fixes the old migration as well.

Resolves https://community.vikunja.io/t/no-longer-able-to-properly-move-tasks-between-kanban-columns/2175

pkg/migration/20240315110428.go

@@ -78,8 +78,9 @@ func init() {
 					if view.ViewKind == 3 { // Kanban view
 
 						pos := taskBuckets20240315110428{
-							TaskID:   task.ID,
-							BucketID: task.BucketID,
+							TaskID:        task.ID,
+							BucketID:      task.BucketID,
+							ProjectViewID: view.ID,
 						}
 
 						_, err = tx.Insert(pos)