As a developer,
I want to produce event messages to the service-instance-ingress topic,
So that the necessary events are processed and passed on for further handling.

Acceptance Criteria:

1. Kafka Producer:
   • The Quarkus app successfully produces swatch Event messages to the service-instance-ingress topic when the Unleash feature flag from SWATCH-2924 is enabled.
   • If SWATCH-2875 is not completed, use a hardcoded event payload string.
2. Message consumption 
   • swatch-tally consumes the message, sends it through its usual Event Ingestion pipeline, and results in an event database record being inserted
   • Event Ingestion/Reconciliation should behave in its usual way (aka no regressions in current dedup logic)
3. Verify hourly tally doesn't pick up these event records
   • they shouldn't because the events will have a service type of HBI_HOST, and there are no product configs that match HBI_HOST
4. Automated Testing
   • Add component tests for new swatch-metrics-hbi
     • happy path test with a life-like example of an HBI event compared with the swatch Event emitted by swatch-metric-producer
     • ensuring that the unleash feature flag is honored (does this count as functional test?)
   • Functional test
     • when swatch-metrics-hbi emits an Event, swatch-tally consumes it