CodeRabbit Generated Unit Tests: Add generated unit tests

[coderabbitai]

Unit test generation was requested by @BillChirico.

• feat: rate limiting + suspicious link filtering (#39) #93 (comment)

The following files were modified:

• tests/modules/events.test.js
• tests/modules/linkFilter.test.js
• tests/modules/rateLimit.test.js

[coderabbitai]

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