Added a new function `RegisterMethodToV1Enum()` to Node, converting the internal register method string to the corresponding V1 Enum value. Included corresponding unit test in `node_test.go` to ensure correct conversion for various register methods.
Added a new function `RegisterMethodToV1Enum()` to Node, converting the internal register method string to the corresponding V1 Enum value. Included corresponding unit test in `node_test.go` to ensure correct conversion for various register methods.