⚡ Bolt: Optimize Foundation Formatters and Array Iteration

[acebytes]

💡 What: Replacing repeated instantiations of ByteCountFormatter and ISO8601DateFormatter with cached instance/static properties and optimizing array reductions to eliminate intermediate array allocations.
🎯 Why: Instantiating Foundation formatters repeatedly is computationally expensive and causes measurable performance hits, particularly during frequent UI updates or looping structures.
📊 Impact: Substantially reduces unnecessary object allocation overhead and GC pressure.
🔬 Measurement: Observe reduction in CPU spikes and memory allocations when repeatedly generating byte count strings and looping through result arrays.

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PR created automatically by Jules for task 15487874973957091639 started by @acebytes

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