docs: align config JSDoc defaults with docs

[chenjiahan]

Summary

• align configuration JSDoc defaults such as security.sri and performance options with latest documentation
• document default values for preload/prefetch resource hints and data URI limits

Testing

• not run (not requested)

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Codex Task

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[Copilot]

Pull Request Overview

This PR updates JSDoc default value documentation in the configuration type definitions to better align with the actual codebase implementation and latest documentation.

• Adds missing @default JSDoc tags for several performance and output configuration options
• Updates the default value documentation for security.sri.enable
• Documents specific default values for data URI size limits

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