%groups v9.0.1

This release improves messaging performance and reliability by adding efficient message synchronization, fixing threading issues, resolving image upload problems, and addressing various UI bugs related to roles and gallery previews.

• Adds support for the new /changes endpoint for efficient message delta retrieval
• Adds support for sequence numbers in channels and DMs such that messages are displayed in the order they are sent for everyone in the group or DM
• Improves scry performance by dropping all image metadata strings >3kb
• Improves background performance by trimming active subscriptions to unjoined groups
• Fixes an issue with text rendering in Gallery text item previews
• Fixes an issue where the Admin role appeared to be editable
• Fixes an issue where viewing a group preview would cause performance issues on the server
• Fixes an issue where historical incomplete image uploads would cause degraded performance
• Fixes an issue where image uploads in avatar and group info fields would fail silently
• Fixes an issue where pending messages sent in a thread would briefly reappear in the main channel until sent, or stick in the main channel if failed
• Fixes an issue where lots of roles in the channel permission fields would not wrap to the next line

This release remedies corrupted image data in group info images and user avatars. You may notice images missing for group images or avatars; simply re-upload the image in place.