Prepare bugfix release 1.5.1

Entire-Checkpoint: 15cc90a0347a

ReleaseNotes.md

@@ -1,11 +1,43 @@
-# `cc-backend` version 1.5.0
+# `cc-backend` version 1.5.1
 
-Supports job archive version 3 and database version 10.
+Supports job archive version 3 and database version 11.
 
-This is a feature release of `cc-backend`, the API backend and frontend
+This is a bugfix release of `cc-backend`, the API backend and frontend
 implementation of ClusterCockpit.
 For release specific notes visit the [ClusterCockpit Documentation](https://clusterockpit.org/docs/release/).
 
+## Changes in 1.5.1
+
+### Database
+
+- **New migration (version 11)**: Optimized database index count for better performance
+- **ANALYZE on startup**: Database statistics are now refreshed on startup for improved query planning
+- **SQLite configuration hardening**: Sanitized SQLite configuration with new configurable options; fixes large heap allocations in the SQLite driver
+- **Query cancellation**: Long-running database queries can now be cancelled
+- **Resource leak fix**: Added missing `defer Close()` calls for all query result sets
+
+### Bug fixes
+
+- **Segfault when taggers misconfigured**: Fixed crash when `enable-job-taggers` is set but tagger rule directories are missing
+- **GroupBy stats query complexity**: Reduced complexity for `groupBy` statistics queries
+- **Ranged filter conditions**: Fixed GT and LT conditions in ranged filters
+- **Energy filter preset**: Reduced energy filter preset to a more practical default
+- **JSON validity check**: Fixed wrong field being checked for JSON validity
+- **Tagger float rounding**: Fixed rounding of floats in tagger messages
+- **Node view null safety**: Added null-safe checks in node view to prevent runtime errors
+
+### Frontend
+
+- **Bumped patch versions**: Updated frontend dependencies to latest patch versions
+
+### Documentation
+
+- **New DB config options**: Added new database configuration options to README
+
+---
+
+*The sections below document all features and changes introduced in the 1.5.0 major release, which 1.5.1 is based on.*
+
 ## Breaking changes
 
 ### Configuration changes
@@ -34,7 +66,7 @@ For release specific notes visit the [ClusterCockpit Documentation](https://clus
 
 ### Dependency changes
 
-- **cc-lib v2.5.1**: Switched to cc-lib version 2 with updated APIs (currently at v2.5.1)
+- **cc-lib v2.8.0**: Switched to cc-lib version 2 with updated APIs
 - **cclib NATS client**: Now using the cclib NATS client implementation
 - Removed obsolete `util.Float` usage from cclib