fix: help metadata update

[Maria-Niya]

Description

Added missing help text to the target field in the dnsx plugin metadata (plugins/dnsx/metadata.json). The new copy clearly explains the expected input format and operator intent to the user, preventing confusion when the plugin form is rendered in the UI. Additionally, refreshed the plugin checksum to ensure validation passes.

Related Issues

Closes #524

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ x ] Documentation update

How Has This Been Tested?

1. Modified plugins/dnsx/metadata.json locally.
2. Ran the checksum refresh script successfully: python scripts/refresh_plugin_checksum.py --plugin dnsx
3. Ran the validation script to ensure the new checksum and syntax are correct: python scripts/validate_plugins.py (Validation passed with no errors).

Checklist

• [ x ] My code follows the code style of this project.
• [ x ] I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• [ x ] I have made corresponding changes to the documentation.
• [ x ] My changes generate no new warnings.

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Updates the dnsx plugin metadata to improve UI/UX text and adjust displayed icon, with a corresponding checksum update.

Changes:

• Switched the plugin icon representation from a Unicode escape to a literal emoji.
• Added a help description to the Domain input parameter.
• Updated the metadata checksum value.

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[Maria-Niya]

Hi, I am not understanding why the backend integration test is failing, i have added the 'help' metadata and have updated the checksum. Any tips on what should I do next?

[utksh1]

Thanks. This is close but not ready: backend integration is failing, and the diff changes the icon while the issue only needs dnsx field help text plus the correct checksum. Please remove unrelated icon churn, refresh the checksum from the repo script, rebase on main, and rerun checks.

[Maria-Niya]

I have done whatever you have asked and only changed the help text and refreshed the checksum but the backend is still failing.

[utksh1]

Approved after maintainer cleanup. The PR is now focused on plugin field help text and the affected plugin checksum validates locally.