Data-service pods use NetworkPolicy egress selector app: trading-kafka
but Strimzi Kafka pods are labeled strimzi.io/name=trading-kafka.
This silently blocked all Kafka traffic causing NoBrokersAvailable.
Migrate trading platform DB egress rule from hermes-pgdb to
siriusdevops-pgdb to complete the trading DB migration. The
configmaps already point to siriusdevops-pgdb-rw but the
network policy still allowed egress to the old cluster.