How to reproduce:
1. Open a large project (user reproduced with ~114k assets, 33 monitored roots: Assets + 32 embedded packages) on a Windows Dev Drive (ReFS volume)
2. Observe the project loading splash screen
Actual result: DirectoryMonitorWindows::Sync blocks forever on the main thread, the editor hangs indefinitely at the splash screen with all threads parked and must be killed
Expected result: DirectoryMonitorWindows::Sync completes, or fails gracefully (timeout / error → refresh falls back to a full scan, as already happens for the buffer-overflow case at :305-323 which sets m_SyncError and signals).
Reproducible with: 6000.3.20f1
Reproducible on: Windows 11
Not reproducible on: No other environments tested
Workaround: Disable Directory Monitoring using "-DisableDirectoryMonitor" or “Preferences → Asset Pipeline → Directory Monitoring”.
Note: Not consistently reproducible - may need reopening the project multiple times until it hangs on splash screen.