Default values for User attributes

[EdoardoTona]

Problem Statement

Keycloak introduced default values for user custom attributes in keycloak/keycloak#39746

Proposed Solution

Add the defaultValue property

    - name: newsletter
      displayName: ${profile.attributes.newsletter}
      defaultValue: "false" // <--- ADD THIS
      validations:
        options:
          options:
            - "true"
            - "false"
      annotations:
        inputType: select-radiobuttons
      permissions:
        view:
          - admin
          - user
        edit:
          - admin
          - user
      multivalued: false

Environment

• Keycloak Version: 26.4.0+
• keycloak-config-cli Version: 6.4.0-26

Additional information

No response

Acceptance Criteria

No response