vagrant-registry: Cannot pass checksum while uploading vagrant box

[naveenrajm7]

Overview of the Issue

Cannot pass checksum while uploading vagrant box

Reproduction Steps

Steps to reproduce this issue

    # Upload the box to Vagrant Registry
    post-processor "vagrant-registry" {
      client_id     = "${var.hcp_client_id}"
      client_secret = "${var.hcp_client_secret}"
      box_tag       = "utm/${var.box_name}"
      version       = "${var.version}"
      architecture  = "${var.os_arch == "x86_64" ? "amd64" : var.os_arch == "aarch64" ? "arm64" : var.os_arch}"
      # There is no way to pass , check sum generated from previous steps, please provide some way
     # So it is hard coded out of no choice
      box_checksum = "sha512:989b3083771a68e55d08851af0be122c2b3f5efc0eb48ed1385cafb650ae1ec9b073d9434f8ff3904f828f9e80791ff39c5f6a15960fd1d5cf7252da6e0c52b7"
    }

Even with box_checksum is passed in proper format , the build just fails with error

 error: Failure creating new architecture: checksum: value: checksum must not be set when type is NONE

From debugging, I found the issue is not with the vagrant plugin , but with packer-sdk. I'm reporting here because this is where users consume those models from sdk.
Issue happens here :

packer-plugin-vagrant/post-processor/hcp-vagrant-registry/step_create_architecture.go

Line 110 in 053b1ca

state.Put("error", fmt.Errorf("Failure creating new architecture: %s", errMsg))

Plugin and Packer version

Packer v1.11.1
packer-plugin-vagrant_v1.1.6

Operating system and Environment details

OS, Architecture, and any other information you can provide about the
environment.

sw_vers
ProductName:		macOS
ProductVersion:		14.6.1
BuildVersion:		23G93

Log Fragments and crash.log files