Add tests for missing modules: ban-list and lightning-tournaments

[diangogav]

Summary

The modules ban-list and lightning-tournaments currently lack unit or integration tests. This makes it difficult to ensure their quality and correct behavior. The goal is to create tests that cover the main use cases and error scenarios for these modules.

Acceptance Criteria

• Add unit and/or integration tests for the ban-list module.
• Add unit and/or integration tests for the lightning-tournaments module.
• Tests should cover both successful and error cases.
• Tests should be easy to run with the existing test setup.

---

This issue is ideal for Hacktoberfest and new contributors!