⚡ Bolt: [performance improvement] Optimize GetRackCount to O(1) in GregFacilityModule

[mleem97]

💡 What: Replaced FindObjectsOfType<Il2Cpp.Rack>().Length with the O(1) NetworkMap.instance.GetNumberOfDevices()[2] in GregFacilityModule.GetRackCount().
🎯 Why: FindObjectsOfType scans the entire object hierarchy, causing high CPU load and UI hitches when used frequently or on late game saves with many objects.
📊 Impact: Transforms an O(n) hierarchy scan to an O(1) array index lookup, drastically improving execution speed for this API call.
🔬 Measurement: Observe CPU load reduction during periods where GetRackCount() is called in the game loop. Validated by ensuring unit tests continue to pass.

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PR created automatically by Jules for task 8847535518358910508 started by @mleem97

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