Since docs

[masteradhoc]

What?

Update docblocks to include @SInCE tags inline with WordPress documentation standards.

Why?

Accurate @SInCE tags help maintainers and users track when APIs were introduced, and they are required for WordPress coding standards compliance.

How?

Checked git blame step by step and added since tags based on when the functions initially

Testing Instructions

• Run phpcs to confirm docblock standards compliance.

Changelog Entry

Changed - Standardized @SInCE annotations in core/compat docblocks to match WordPress documentation standards.

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