Version: 1.21.2
### Added
- Added `wp redis flush-group` CLI command
### Changed
- Reduced overall memory usage
- Made cache key generation slightly faster
- Enable flush logging by default
- Log `warning` level by default
- Execute not split `alloptions` reads on primary node
- Refactored object cache metrics to use new `ObjectCacheMetrics`
- Enabled flush logging when `save_commands` is set
- Disabled command logging entirely unless `save_commands` is set
- Return primary node from `*SentinelsConnection::client()` instead of sentinel client
### Fixed
- Handle foreign keys without a group in groups REST API endpoint
- Respect `async_flush` when using `wp_cache_delete()`
### Removed
- Dropped support for Query Monitor <=3.8.0 backtraces
- Removed metrics keys from `info()` in favor of `metrics()`
- Removed `backtrace_summary` logging and deprecated `BacktraceLogger`