Fixed infinite scroll on archive page

[girishpanchal30]

Summary

Created the tax_query for the infinite scroll on the archive page.

Check before Pull Request is ready:

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• Security and Sanitization requirements have been followed
• I have assigned a reviewer or two to review this PR

Closes https://github.com/Codeinwp/neve-pro-addon/issues/3151

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Pull request overview

This PR aims to fix infinite scroll on taxonomy archive pages by ensuring the REST infinite-scroll request includes the necessary taxonomy filtering information.

Changes:

• Adjusts localized infinite-scroll query payload for taxonomy archives by injecting a post_type.
• Extends infinite-scroll query sanitization to construct a tax_query from taxonomy query vars.
• Updates the sanitization docblock messaging around expensive query vectors.

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[Soare-Robert-Daniel]

@girishpanchal30, to confirm, the regression was because you missed the taxonomy handling on 721d2ad? I was wondering, since in that commit you removed the tax_query from $dangerous_keys, with this PR, you introduce something to use it or some sort of it.

[girishpanchal30]

@Soare-Robert-Daniel Yes, I missed the taxonomy handling in 721d2ad. Because of that, WP_Query was fetching posts on the archive page. I’ve now added a tax_query for the taxonomy to correctly query custom post types on the archive page.