flatten the properties into describedb

Signed-off-by: Xianhui.Lin <xianhui.lin@zilliz.com>

pymilvus/client/types.py

@@ -981,8 +981,9 @@ def __str__(self) -> str:
 
     def to_dict(self) -> Dict[str, Any]:
         """Converts the DatabaseInfo instance to a dictionary."""
-        return {"name": self.name, "properties": self.properties}
-
+        result = {"name": self.name}
+        result.update(self.properties)
+        return result
 
 class ExtraList(list):
     """