chore: remove unused FILE_FLAG_OVERLAPPED import #18

Job	Run time
🔨 Build Check (Skipped - use local)	3s
📝 Format Check	1m 42s
🔒 Security Audit	1m 12s
🔍 Quick Sanity Check	1m 45s
📊 CI Summary	4s
	4m 46s

Provide feedback