feat: add name field to ManagedCard model

[tessstoddard]

Summary of Changes

Add name field to ManagedCard model. And cleanup the model to use @Data annotation.

Fixes # https://mxcom.atlassian.net/browse/GCU-1449

Public API Additions/Changes

Added new field to ManagedCard. Spec change here: https://gitlab.com/mxtechnologies/mx/gutenberg/-/merge_requests/979

Downstream Consumer Impact

No downstream impact

How Has This Been Tested?

Used a local snapshot to verify

GET http://localhost:3009/globalcu/users/U-00u3la36x0bbNvPud1d7/managed_cards

HTTP/1.1 200 
Content-Type: application/vnd.mx.mdx.v6+json;charset=UTF-8
Content-Length: 564
Date: Thu, 10 Sep 2026 22:02:41 GMT

{
  "managed_cards": [
    {
      "account_id": "A-1504331-V-1hY6fFt",
      "account_type": "CREDIT",
      "expiration_on_card": "01/30",
      "id": "79662feb46c26a3b705ad45c3d003216d7d5d3b616bdde01385834f46e37a2e5",
      "image_url": "https://public.globalcu.org/images/cards/MARINERS_VISA_CC_LARGE.png",
      "issuance_type": "PHYSICAL",
      "masked_number_on_card": "****2774",
      "name": "Visa Platinum",
      "name_on_card": "MARGARET DICKENS",
      "status": "ENABLED",
      "type": "VISA",
      "user_id": "U-00u3la36x0bbNvPud1d7"
    }
  ]
}

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works

[gerfboy]

Love this.