Release notes v5.1.0

Fixes

• Busy status mapping:  Busy status is now mapped correctly, instead of dnd.
• IM Provider: Added extensive caching to prevent duplicate web calls, improving presence lookup performance and reducing Nextcloud server load.

New

• Configurable default expiration date: When expiration is not enforced by policy, the default expiration date can now be overridden. Configure this in the Sendent app in Nextcloud.