Optimize best-selling product query by category

[CySSoO]

Motivation

• Reduce query time and avoid scanning unrelated products when building best-seller lists for a category, while ensuring ordering parameters are safely used.

Description

• Added an INNER JOIN to product_shop and added ps.id_shop = $shopId and ps.active = 1 filters so only active products from the current shop are considered.
• Applied pSQL() to the ORDER BY and ORDER WAY expressions to ensure the ordering parts are sanitized before concatenation into the SQL string.
• Kept existing GROUP BY and caching behavior in place and continue to cache category best-seller results for 24 hours.

Testing

• No automated tests were executed.

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Codex Task