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
- Improved comment system performance and caching

Bug Fixes:
- Fixed event fetcher and comment creation/deletion logic
- Fixed profile avatar/banner rendering and image loading
- Fixed UI navigation and recursive rendering issues
- Fixed profile updates and feed loading race conditions

Architecture Changes:
- Removed deprecated QML components (NostrImage, NostrProfileAvatar, etc.)
- Added new ProfileBanner and ProfilePicture components
- Anchored relays in app state to preserve UI identity
- Re-enabled inbox model reconciliation and follow list functionality

Build & Configuration:
- Version bump to 0.4.2.1
- Added parallel GC configuration

Author: prolic

futr.cabal

@@ -1,6 +1,6 @@
 cabal-version:      2.4
 name:               futr
-version:            0.4.2.1
+version:            0.5.0.0
 license:            GPL-3.0-only
 license-file:       LICENSE
 copyright:          2025 Sascha-Oliver Prolić

src/Version.hs

@@ -4,7 +4,7 @@ module Version where
 
 -- | Version string extracted from cabal file
 versionString :: String
-versionString = "0.4.2.1"
+versionString = "0.5.0.0"
 
 -- | Runtime version in 'v0.4.0' format
 runtimeVersion :: String