Fix hearthis variant mapping in Player Checker toolkit

[Subfader]

Motivation

• Hearthis URL variants were being emitted as separate list items (one per variant) instead of mapping short/long variants into a single line, causing duplicated and empty entries in the Player Checker toolkit output.

Description

• Preserve each item’s original variant role by recording the original variant type into a new data-variantorigin attribute on the processed link and its parent list item in includes/toolkit.js.
• Use the data-variantorigin metadata to only remove the mirrored not-preferred duplicate when a preferred origin item exists, keeping the preferred-origin list item intact and restoring the single-line short = long mapping behavior.
• Bumped the Player Checker userscript version and updated the @require cache-buster for includes/toolkit.js in Player_Checker/script.user.js.

Testing

• Ran node --check includes/toolkit.js which completed successfully.
• Ran node --check Player_Checker/script.user.js which completed successfully.

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Codex Task