Summary

Run and especially Stop behavior are under-tested and rely heavily on slow integration paths.

Problem

Critical startup/shutdown error handling lacks deterministic unit coverage.

Scope

• Refactor minimally for dependency injection where needed
• Add table-driven unit tests for success/error paths in Run and Stop
• Keep integration tests for full-stack behavior only

Acceptance Criteria

• Error and success paths in Run and Stop are unit-tested
• Stop shutdown behavior is verified deterministically
• Affected test suite runs without external services

References

• pkg/app/app.go