[AUDIT] Increase Test Coverage from 11 tests

Critical: Low Test Coverage

Severity: HIGH

Current State

• Only 11 test files found
• External API client needs comprehensive testing

Required Actions

1. Write unit tests (90% coverage)
2. Write integration tests with mocks (80% coverage)
3. Add E2E tests for API flows
4. Enforce coverage in CI/CD

Definition of Done

• Minimum 80% test coverage
• All tests passing in CI/CD
• Mock external APIs properly
• TDD enforced for new code