CheckIsArchived() previously skipped checking a child project's own
IsArchived flag when ParentProjectID > 0, immediately recursing to
only check the parent. This allowed write operations on individually
archived child projects whose parent was not archived.
Now the function loads the project from the database first, checks its
own IsArchived flag, and only then recurses to check parent projects.
As I mentioned [here](https://kolaente.dev/vikunja/api/pulls/1442#issuecomment-55215), this is mainly a cleanup of @zewaren 's original [PR](https://kolaente.dev/vikunja/api/pulls/1442).
It adds support for the `RELATED-TO` property in CalDAV's `VTODO` and the `RELTYPE=PARENT` and `RELTYPE=CHILD` relationships. In other words, it allows for `ParentTask->SubTask` relations to be handled supported through CalDAV.
In addition to the included tests, this has been tested by both @zewaren & myself with DAVx5 & Tasks (Android) and it's been working great.
Resolves https://kolaente.dev/vikunja/api/issues/1345
Co-authored-by: Miguel A. Arroyo <miguel@codeheads.dev>
Co-authored-by: Erwan Martin <public@fzwte.net>
Reviewed-on: https://kolaente.dev/vikunja/api/pulls/1634
Reviewed-by: konrad <k@knt.li>
Co-authored-by: Miguel Arroyo <mayanez@noreply.kolaente.de>
Co-committed-by: Miguel Arroyo <mayanez@noreply.kolaente.de>