⚡ Bolt: Batch @Published array updates to reduce UI re-renders

[acebytes]

💡 What: Replaced for loops with .map functions when modifying @Published collections (scanResults and nodeModulesItems) in CacheoutViewModel.

🎯 Why: Mutating array elements sequentially within a loop fires standard @Published notifications for every single element, causing massive redundant SwiftUI view recalculations.

📊 Impact: Reduces $O(N)$ re-renders to $O(1)$ re-render per batch selection/deselection action, saving significant CPU cycles and maintaining UI responsiveness on large scan lists.

🔬 Measurement: Select all node modules and use Instruments (SwiftUI template) to verify that view recalculations are grouped into a single batch instead of scaling linearly with item count.

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PR created automatically by Jules for task 17591344167392478732 started by @acebytes

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