Added the new REMOTE parameter of EXPLAIN, enabled by default, which allows the EXPLAIN output for queries executed on foreign servers.

Implemented a Shardman-specific estimation logic for plan costs. It may help the planner choose generic plans more often when the overall shape of a generic plan is similar to that of a custom plan.

Added support for initial pruning of foreign aggregate plan nodes.

Added cumulative metrics for the network traffic between Shardman cluster nodes in the shardman.pg_stat_netusage view.

Updated the pg_stat_activity view to show the status of the monitor's worker processes.

Prevented the CVE-2023-45288 and CVE-2023-44487 vulnerabilities.

Fixed a bug in the shardmanctl cleanup command that could make it impossible to delete replication groups.

Improved the output of the shardmanctl forall command in the cases where the result is empty.

Fixed shardmand failures that could occur when the Shardman cluster was underconfigured.