A service boundary accepts valid traffic but mishandles duplicate, stale, or unauthorized records. The affected area is Kafka consumer.
Repair the Kafka consumer module boundary implementation so it ranks change-prone modules, preserves ownership boundaries, and identifies where characterization tests are required before extraction.
Evidence
- Affected surface: Spring / Kafka consumer.
- Observed failure family: choose a safe refactoring boundary.
- Scope policy: retained must equal true.