[TASK] Implement period closing procedures test - Month-End Closing Workflow

[africanitem]

Task Details

Epic: #613 [EPIC] Month-End Closing Workflow E2E Tests

Dependencies

• Depends on: [TASK] Implement final report generation test - Month-End Closing Workflow #620

Success Criteria

• Test closes period, verifies period is closed successfully, verifies period cannot be modified