Docs: add PHPDoc for rest_revision_query filter

[apermo]

Summary

The rest_revision_query filter in WP_REST_Revisions_Controller::get_items() carried a cross-reference comment claiming it was documented in the posts controller:

/** This filter is documented in wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php */
$args = apply_filters( 'rest_revision_query', $args, $request );

That cross-reference is incorrect. The posts controller documents rest_{$this->post_type}_query — a dynamic hook that fires only for post types managed by WP_REST_Posts_Controller. WP_REST_Revisions_Controller extends WP_REST_Controller directly (not the posts controller), so the dynamic hook never fires for revisions. rest_revision_query is a standalone hook and has never had its own PHPDoc block.

Deeper context apermo#9

Changes

• Replace the broken cross-reference comment with a proper @since 4.7.0 PHPDoc block for rest_revision_query
• Add @see WP_REST_Posts_Controller::get_items() to the get_items() method docblock to surface the parallel relationship between the two controllers, following the same {@see} pattern used in comment.php and post.php for related hooks

Trac ticket: https://core.trac.wordpress.org/ticket/64224

Use of AI Tools

Research (architectural investigation, prior-art search across core) and code were produced by Claude Code (claude-sonnet-4-6). The contributor reviewed the findings, steered the documentation approach, and approved the final implementation.

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[mukeshpanchal27]

Suggested change

	* @param WP_REST_Request $request The REST API request.
	* @param WP_REST_Request $request Request used to generate the response.