Empty JSON '{}' caused event-manager TopicSettingServlet to fail during
Kafka producer initialization. Set correct format: {"events":["GCP_KAFKA"]}
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
INSERT IGNORE ensures idempotency on re-deploy (PK: entity_type, entity_value, property_type).
Required by eventManagerServiceV2 at startup for TopicSettingServlet.refreshTopicSettings().
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>