⚡ Bolt: Batch @Published array updates

[acebytes]

💡 What: Replaced for loops with .map to batch updates to @Published arrays (scanResults and nodeModulesItems) in CacheoutViewModel.
🎯 Why: Mutating individual elements of a @Published array property inside a loop triggers a UI update notification for every change, causing performance bottlenecks.
📊 Impact: Significantly reduces unnecessary UI recalculations and re-renders during bulk selection operations.
🔬 Measurement: Observe CPU usage and UI responsiveness when selecting/deselecting multiple cache categories or node_modules simultaneously.

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PR created automatically by Jules for task 7051850445816927445 started by @acebytes

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