IBM Db2 LUW CDC agent changelog

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

IBM Db2 LUW CDC: significant performance optimization for CDC state updates;

IBM Db2 LUW CDC: increased default CDC batch size (cdcBatchSize) from 1,000 to 10,000 for higher read-update flushing throughput;

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

IBM Db2 LUW CDC: CDC now stops with a single actionable error when one source transaction exceeds the log reader per-transaction record limit, instead of retrying that transaction on every poll;

IBM Db2 LUW CDC: added a configurable per-transaction event limit for the log reader, left at the library default when unset;

IBM Db2 LUW CDC: CDC no longer consumes rows belonging to a source transaction the log reader has only partly committed;

IBM Db2 LUW CDC: fixed the stored procedure creation stalling the agent warm-up behind an in-flight log reader invocation;

IBM Db2 LUW CDC: the pipeline reset checkpoint action now reaches the log reader, which previously kept failing with a missing checkpoint row;

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;

Initial release