Fixed windows deadlocks, performance is shit tho

cpp/src/Public/sweepstore/utils/file_lock.h

@@ -84,6 +84,9 @@ private:
             if (it->second == Mode::Shared && mode == Mode::Exclusive) {
                 releaseInternal();  // Release the old shared lock
                 activeLocks.erase(it);
+                // Small delay to allow OS to process the unlock before re-locking
+                // This prevents deadlock when multiple threads upgrade simultaneously
+                Sleep(1);
             } else {
                 // Already hold compatible or same lock
                 locked = true;