Add unit tests for processSetOptions function

[coderabbitai[bot]]

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The function processSetOptions in packages/mcots/messageProcessors/processSetOptions.ts is not covered by tests. This issue is to track the task of adding unit tests to ensure proper test coverage.\n\nPR URL: https://github.com/rustymotors/server/pull/2037\nComment URL: https://github.com/rustymotors/server/pull/2037#discussion_r1724151986