Merge branch 'dev/version-bump-09122025' into 'murena-main'

* 📎 **Attachments!** Add, upload and view event attachments

* 🙈 **We’re not reinventing the wheel!** Based on the great [c-dav library](https://github.com/nextcloud/cdav-library), [ical.js](https://github.com/mozilla-comm/ical.js) and [fullcalendar](https://github.com/fullcalendar/fullcalendar) libraries.

	]]></description>

	<version>5.3.5+murena-20251016</version>

	<version>5.3.5+murena-20251209</version>

	<licence>agpl</licence>

	<author homepage="https://github.com/st3iny">Richard Steinmetz</author>

	<author homepage="https://github.com/SebastianKrupinski">Sebastian Krupinski </author>