IBM Db2 for LUW agent changelog

Added the source lag probe, reporting the unread change backlog and how far behind the last read transaction is;

GSSD-1357: CDC table reconciliation no longer drops and re-adds columns whose declared type never changed, which wiped them to NULL and raised a resync notification on every setup run;

GSSD-1357: A failing CDC table update no longer leaves a column dropped and unreplaced, breaking every read until a later setup run succeeds;

GSSD-1357: A column type that could not be rendered is now logged with its cause and with which side failed;

Agent parameters that were previously hardcoded are now user-configurable;

IBM Db2 LUW CDC and triggers: the staging tables retention is now applied in hours, as the setting states, where it was previously subtracted in days;

IBM Db2 LUW CDC and triggers: a staging tables retention of zero now disables the purge instead of building a query for it;

GSSD-1120: Fixed deduplication logic for primary keys columns with case insensitive collation;

GSSD-990: Added support for trimming trailing spaces for text columns;

GSSD-990: Fixed case sensitivity of columns and tables;

GSSD-990: Removed a semicolon from a columns discovery query that in some environments was causing the query to fail;

Improved support for enhaced columns discovery (precision, lenght, scale);

Fixed an issue with last transaction retrieval on high concurrency scenarios;

Snapshot performance enhancements;

Agent compatibility upgrade to Gluesync 2.2;