📝 Add docstrings to feat/warning-system

[coderabbitai]

Docstrings generation was requested by @BillChirico.

• feat: Sentry error monitoring integration (#38) #91 (comment)

The following files were modified:

• src/db.js
• src/index.js

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• tests/index.test.js
• tests/sentry.test.js

These file types are not supported

• .env.example
• package.json

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