Need additional database columns to support log aggregation at source

Need to add the following database columns to support log aggregation at source.
seq_num - default=0 and type equivalent to Java Long
event_count - default=1 and type equivalent to Java Long
event_dur_ms - default=1 and type equivalent to Java Long

Need to add these to all the database flavors we support

Also add the following fields in the Admin Audit listing:
event_count - Label=Event Count
event_dur_ms - Label = Event Duration (in ms)