⚡ Bolt: [performance improvement] Optimize AdaptiveCacheEngine to track size in O(1) time

[LeanBitLab]

💡 What: Refactored AdaptiveCacheEngine.kt to track the cache sizeBytes with a running AtomicLong instead of calculating it via store.values.sumOf { it.sizeBytes }.
🎯 Why: The sumOf method was iterating over the entire ConcurrentHashMap inside dynamicCapacity, which was called by trimToCapacity() on every put(). This was making cache insertion cost O(N) per item, creating O(N²) overall insertion times as the cache grew, leading to UI stutters during infinite scrolls.
📊 Impact: Reduces dynamic capacity calculation from O(N) to O(1).
🔬 Measurement: Benchmarking the cache under high volume data flow will show significantly smoother UI rendering and less main thread blocking.

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PR created automatically by Jules for task 15353149932516519513 started by @LeanBitLab

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