⚡ Bolt: Replace static chunking with sliding window in ProcessMemoryScanner

[acebytes]

💡 What: Refactored scanPIDs in ProcessMemoryScanner.swift to use a continuous sliding window with withTaskGroup instead of static batch chunking.
🎯 Why: Static chunking suffers from tail latency (waiting for the slowest PID scan in a chunk before starting the next batch). A sliding window keeps the concurrency pool continuously saturated up to maxConcurrency, improving overall scanning throughput.
📊 Impact: Maximizes concurrent scanning efficiency; reduces total time taken to scan all PIDs by eliminating wait times between chunks.
🔬 Measurement: To verify, one can measure the total duration of the ProcessMemoryScanner().scan() operation before and after this change, especially under varying system loads.

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PR created automatically by Jules for task 17024677026283096264 started by @acebytes

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