ECDC-3237 Add support to process commands starting at timestamp
Created by: danesss
Issue
Fix behaviour when starting/stopping FW job in short sequence https://jira.esss.lu.se/browse/ECDC-3237
Description of work
To be able to start listening for Commands starting at a specific timestamp, we modify CommandListener to optionally be constructed with a timestamp. When the timestamp is defined, the CommandListener's kafka consumer will assign partitions based on offsets, rather than by subscribing to the topic from "now".