dc_catalog_truncations improvements

After a cluster restart (normal or crash), there is no indication how many transactions were rolled back by the system. New columns epoch_before_truncation and epoch_after_truncation have been added to the dc_catalog_truncations tables to track where the workload needs to be restarted to catchup the missing transactions.

DC_CATALOG_TRUNCATIONS Improvements

After a cluster restart (normal or crash), there is no indication how many transactions were rolled back by the system. New columns epoch_before_truncation and epoch_after_truncation have been added to the dc_catalog_truncations tables to track where the workload needs to be restarted to catchup the missing transactions.