v5.2.1

Enhancements

#11487 The bcrypt work factor is limited to the range 5-10, because higher values consume too much CPU resources.
Bcrypt library is updated to allow parallel hash evaluation.
#11532 Improve some error reasons when parsing invalid packets.
#11568 Added support for defining templates for MQTT 5.0 publish properties and user properties in Republish rule action.

#11493 Examples and documentation for /api/v5/publish bad request response have been fixed. Previously the documentation example said that the bad request response could return a list in the body which was not actually the case.
#11499 Upgrade Erlang/OTP to 25.3.2-2
Erlang/OTP 25.3.2-2 excludes sensitive data from mnesia_hook log message.
#11506 Don't download a trace log file if it is empty.
After this fix, GET /api/v5/trace/clientempty/download returns 404 {"code":"NOT_FOUND","message":"Trace is empty"}
If no events matching the trace condition occurred.
#11522 Improved error message for rule engine schema registry when schema name exceeds permissible length.
#11531 Fixed issue where authorization cache cleaning cli was not working properly for specific client ID.
#11564 Fix cluster partition autoheal functionality.
Implement autohealing for the clusters that split into multiple partitions.
#11568 Fixed an issue where an ill-defined built-in rule action config could be interpreted as a custom user function.
#11630 Fixed an issue where the core node could get stuck in the mria_schema:bootstrap/0 state, preventing new nodes from joining the cluster.