Add test coverage for exports in packages/mcots/payloads/index.ts

[coderabbitai[bot]]

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The exports in the file packages/mcots/payloads/index.ts are not covered by tests, according to static analysis. Consider adding tests to verify that each exported module is functioning as expected.\n\nPR URL: https://github.com/rustymotors/server/pull/2037\nComment URL: https://github.com/rustymotors/server/pull/2037#discussion_r1724151948