Unable to query roles due to "role.channels is not iterable"

[jyling]

Describe the bug
Hi, Vendure developers, I recently updated my backend to the latest v2.1.7, however, I encountered a weird behaviour when querying roles from the admin-api. I keep on getting this error. I'm also able to reproduce this by running npx @vendure/create xxxx to run on a new vendure instance

role.channels is not iterable

To Reproduce
Steps to reproduce the behavior:

1. Go to 'http://localhost:3000/admin-api'
2. Query roles

query roles($options: RoleListOptions) {
    roles(options: $options) {
      items {
        id
        code
        description
        permissions
        createdAt
        updatedAt
      }
    }
  }

3. See error

{
  "errors": [
    {
      "message": "role.channels is not iterable",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "roles"
      ]
    }
  ],
  "data": null
}

Expected behavior
I expect I should be able to get the roles.

Workaround
Running the query with channels seems to solve the issue.

query roles($options: RoleListOptions) {
    roles(options: $options) {
      items {
        id
        code
        description
        permissions
        createdAt
        updatedAt
        channels { id }
      }
    }
  }

Environment (please complete the following information):

• @vendure/core version: 2.1.7
• Nodejs version: 18.19.0
• Database (mysql/postgres etc): postgres 15.3

Additional context
Add any other context about the problem here.

[michaelbromley]

Likely related: fc5d981