Fix NIA page form fields not disabled in readonly mode

[Copilot]

On the "Not in Archive" page, 5 form input fields remained editable even when the project was opened in read-only mode — only the radio buttons and download button were correctly disabled.

Changes

• special_pages.py: Add {'disabled ' if readonly else ''} to the 5 fields missing it in not_in_archive_html():

  • cr-root-url-name (Create Root URL: Name)
  • cr-group-url-pattern (Create Group: URL Pattern)
  • cr-group-source (Create Group: Source)
  • cr-group-name (Create Group: Name)
  • cr-download-group-immediately-checkbox (Create Group: Download Immediately)

• test_server.py: Add test_given_readonly_project_then_all_form_input_fields_disabled to assert each field carries the disabled attribute in readonly mode.

• RELEASE_NOTES.md: Document the fix under the main branch section.

Original prompt

Help me fix the issue in this screenshot: An editable field on the Not in Archive (NIA) page when the project is readonly.

The user has attached the following file paths as relevant context:

• .github/instructions/end_to_end_tests.instructions.md
• .github/copilot-instructions.md

Created from VS Code.

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