[ futrnostr/futr ] Merge tag 'v0.5.0'

Major Changes:

- Complete relay system refactor with new EventProcessor

- Profile management overhaul with async image rendering

- Removed Qt classes dependency for better performance

Performance Improvements:

- Added parallel GC (-with-rtsopts=-N)

- Enhanced LMDB database operations

https://github.com/futrnostr/futr/commit/9920328578f178fc19d1fa5be6f263f71a74ed75