chore: clean up PR - remove scope creep and fix changeset

- Revert typed property changes to keep PR focused on WP 6.9 compat
- Remove inaccurate changeset claim about header removal

Author: josephfusco

.changeset/prepare-public-release.md

@@ -7,5 +7,4 @@ Verify WordPress 6.9 compatibility and update CI test matrix
 - Tested compatibility with WordPress 6.9
 - Updated CI test matrix to WordPress 6.9, 6.8, 6.7 (dropped 6.5, 6.6)
 - Updated dev dependencies (mockery/mockery to ^1.6, wp-graphql/wp-graphql-testcase to ^3.4)
-- Removed GitHub Plugin URI and Update URI headers for WordPress.org compatibility
 - Reduced readme.txt tags to 5 for WordPress.org compliance

plugins/hwp-previews/src/Admin/Settings/Fields/Settings_Field_Collection.php

@@ -53,7 +53,7 @@ class Settings_Field_Collection {
 	 *
 	 * @var array<\HWP\Previews\Admin\Settings\Fields\Settings_Field_Interface>
 	 */
-	protected array $fields = [];
+	protected $fields = [];
 
 	/**
 	 * Constructor to initialize the fields.

plugins/hwp-previews/src/Preview/Parameter/Preview_Parameter_Registry.php

@@ -22,7 +22,7 @@ class Preview_Parameter_Registry {
 	 *
 	 * @var self|null
 	 */
-	protected static ?self $instance = null;
+	protected static $instance = null;
 
 	/**
 	 * Registered parameters.

plugins/hwp-previews/src/Preview/Post/Post_Preview_Service.php

@@ -19,21 +19,21 @@ class Post_Preview_Service {
 	 *
 	 * @var array<string>
 	 */
-	protected array $post_types = [];
+	protected $post_types = [];
 
 	/**
 	 * The allowed post-statuses for previews.
 	 *
 	 * @var array<string>
 	 */
-	protected array $post_statuses = [];
+	protected $post_statuses = [];
 
 	/**
 	 * The allowed post-statuses for parent post-types (hierarchical).
 	 *
 	 * @var array<string>
 	 */
-	protected array $parent_post_statuses = [];
+	protected $parent_post_statuses = [];
 
 	/**
 	 * Get the post-statuses.

plugins/hwp-previews/src/Preview/Post/Post_Settings_Service.php

@@ -19,7 +19,7 @@ class Post_Settings_Service {
 	 *
 	 * @var array<mixed>
 	 */
-	protected array $settings_values = [];
+	protected $settings_values = [];
 
 	/**
 	 * Initialize the settings service.