When kubeadm init fails at upload-config/kubelet due missing node object, explicitly restart kubelet to ensure bootstrap flags are loaded before waiting for node registration. Add kubelet flag dump and focused registration log output to surface auth/cert errors.
Remove custom KubeletConfiguration from init config so kubeadm uses default kubelet authn/authz settings and bootstrap registration path. This avoids the standalone-style kubelet behavior where the node never appears in the API.
