Refactor main function to provide sync CLI entry point

lightrag/tools/clean_llm_query_cache.py

@@ -1129,11 +1129,16 @@ class CleanupTool:
                 pass
 
 
-async def main():
+async def async_main():
-    """Main entry point"""
+    """Async main entry point"""
     tool = CleanupTool()
     await tool.run()
 
 
+def main():
+    """Synchronous entry point for CLI command"""
+    asyncio.run(async_main())
+
+
 if __name__ == "__main__":
-    asyncio.run(main())
+    main()