Improved performance of prepared statements by optional remote plan caching (read-only transactions only).

Removed limitation on the statistics size when collecting statistics with the shardman.global_analyze() function.

Broadcast of ALTER INDEX RENAME for sharded tables.

Added the shardman.pg_stat_csn() function to detect performance issues caused by unsynchronized clocks.

Added the PTRACK extension.

Various bug fixes including more fixes of the deadlock detector.

shardmanctl probackup backup: added support for the PTRACK mode.

shardmanctl config update: added automatic resolution for interrupted 2PC transaction.

Improved config structure and parameter validation.

Fixed the deadlock that occurred when two or more shards start the promotion process simultaneously.

Various bug fixes.