chore(release): 0.5.1

- Bump version to 0.5.1
- Update CHANGELOG.md

CHANGELOG.md

@@ -5,6 +5,19 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.5.1] - 2026-04-07
+
+
+### Added
+
+- **daemon**: add on-demand library scan via heartbeat and WebSocket
+
+### Fixed
+
+- **agent**: add retry with backoff and WebSocket connect for daemon registration
+- **daemon**: report failed status on stream request errors
+- **daemon**: use correct systemd user target and isolate test cache
+- **stream**: prevent duplicate events from killing active stream server
 ## [0.5.0] - 2026-04-06
 
 
@@ -15,6 +28,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Other
 
+- **release**: 0.5.0
 - **release**: add changelog generation and release automation
 ## [0.4.1] - 2026-04-01
 
@@ -93,6 +107,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - remove UPX compression (antivirus false positives, startup penalty)
 - add -s -w -trimpath to Makefile, add build-small target with UPX
+[0.5.1]: https://github.com/torrentclaw/unarr/compare/v0.5.0...v0.5.1
 [0.5.0]: https://github.com/torrentclaw/unarr/compare/v0.4.1...v0.5.0
 [0.4.1]: https://github.com/torrentclaw/unarr/compare/v0.4.0...v0.4.1