Metro Cache Key Utility

The `metro-cache-key` package is an internal utility within the Metro bundler ecosystem, primarily responsible for generating consistent and correct cache keys. These keys are crucial for optimizing build performance by enabling Metro to effectively cache various components, such as transformer outputs and Babel configurations, in React Native projects. The package is currently at version 0.84.3. As an integral part of the larger Metro monorepo, its release schedule is synchronized with Metro's development, typically involving frequent minor updates and occasional hotfixes. A key differentiator is its deep integration and specialized optimization for Metro's internal caching strategy, addressing complex factors like user-defined Babel configs to prevent stale caches and ensure build correctness.